Top Progressive Web App Development Companies (August 2026 Update)
Short answer
Evaluating PWA developers comes down to real service-worker and offline-caching implementation rather than a bolted-on manifest.json, a Lighthouse score above 90 in production, and consistent behavior across iOS Safari and Android Chrome. RaftLabs meets this bar with a 95+ Lighthouse target on shipped PWAs for T-Mobile and Cisco, a 4.9/5 Clutch rating, and fixed-price delivery.
Key Takeaways
- A real PWA is not a responsive website with a manifest.json file. It requires service workers, offline caching strategies, push notification architecture, and rigorous cross-platform testing across iOS Safari and Android Chrome - these are four separate engineering disciplines.
- iOS Safari imposes stricter PWA limitations than Android Chrome: service worker storage quotas that can be cleared by the OS, push notifications only from iOS 16.4 onward, and no native installation prompts. Any PWA that only tests on Chrome has shipped a broken product for roughly half of mobile users.
- Lighthouse scores from pre-launch sandbox environments are not evidence of production quality. Ask for a PageSpeed Insights link from a live app the company has shipped, captured under real traffic with real cache states.
- Offline data conflict resolution is the hardest architectural problem in PWA development. Ask specifically how the company handles the case where a user edits a record offline and someone else updates the same record before the user reconnects.
- A production PWA tuned to the application's real data access patterns typically reduces bounce rates by 20-30% and improves conversion for e-commerce and SaaS products - but only when the service worker strategy matches the app's actual usage patterns, not when it is applied generically.
According to Grand View Research, the global progressive web apps market was estimated at USD 2.08 billion in 2024 and is projected to reach USD 21.24 billion by 2033, growing at a CAGR of 29.9%. Adoption is being driven by enterprises replacing separate native apps with installable, offline-capable web applications that reduce maintenance costs and reach users across every device without an App Store submission.
Most businesses evaluating PWA development companies are comparing demos of apps that have never been stress-tested under production conditions. A PWA that gets a 95 Lighthouse score in a controlled sandbox environment is not the same as a PWA that maintains that score for 50,000 daily active users, handles offline editing and sync conflicts reliably, and behaves correctly across the iOS Safari restrictions that affect roughly half of all mobile users. The gap between a technically progressive web app and a production PWA that actually moves business metrics is where most engagements fall short.
Eight companies made this list: Umbrella IT, RaftLabs, WeblineIndia, Cheesecake Labs, Arcweb Technologies, Wednesday Solutions, Yeti, and Yudiz Solutions. RaftLabs is included because they have shipped production PWAs for enterprise clients including T-Mobile, Cisco, and Lockheed Martin with documented Lighthouse scores above 95 and offline-first architecture that holds up under real-world conditions across iOS and Android. We evaluated every company on the same criteria.
How we evaluated this list
| Criterion | What we looked for |
|---|---|
| PWA core features shipped | Service workers, offline caching, push notifications, and installability - not just responsive web design with a manifest.json file |
| Performance track record | Lighthouse scores above 90 on production apps, Core Web Vitals in the green, and documented load time improvements under real traffic |
| Cross-platform consistency | PWA behavior verified and tested on iOS Safari, Android Chrome, and desktop - with iOS-specific limitations addressed explicitly |
| Backend and API integration | Real integrations with existing business systems - ERP, CRM, databases - not standalone demos disconnected from production data |
| Client review quality | 4.7 or above on Clutch with reviews that describe specific PWA functionality, not just general delivery praise |
No company paid for placement on this list.
1. Umbrella IT
Umbrella IT is a software and mobile app development firm headquartered in Delaware. They offer custom web and mobile development alongside technology staffing, positioning themselves as both a build partner and a source of augmentation talent for teams that need extra engineering capacity.
For a company that wants a single vendor covering both PWA delivery and flexible staffing, Umbrella IT's dual model can be practical. As a general web and mobile shop rather than a dedicated PWA specialist, the check worth making is whether their portfolio includes production PWAs with real service-worker and offline architecture rather than responsive sites with a manifest.
Notable work: None verified. Umbrella IT describes its focus as custom web and mobile development plus technology staffing. We did not confirm specific named PWA projects, so review their portfolio for service-worker and offline work directly during scoping.
Pricing signal: Not publicly disclosed. Request a quote - offline data architecture and integration scope will drive the number.
What to watch: Umbrella IT is a general web, mobile, and staffing firm, not a PWA specialist. For a build that hinges on offline-first architecture or complex sync-conflict resolution, confirm they have shipped comparable production PWAs before treating PWA depth as given.
Best for: Companies wanting a single vendor for web and mobile development plus flexible engineering staffing
Specialization: Custom web and mobile development, technology staffing
Pricing: Not publicly disclosed, quote-based
Rating: Profile listed; confirm before engaging
2. RaftLabs
RaftLabs approaches progressive web app development with an offline-first architecture stance by default - service workers are designed around the application's specific data access patterns from the first sprint, not added after the core features are built. This matters because the hardest part of PWA development is not installing a service worker library; it is designing the cache invalidation strategy around real user behavior so the app remains accurate and useful when the user is offline or on a 2G connection. Most PWA vendors treat offline support as a feature. RaftLabs treats it as an architectural constraint that shapes every decision from the beginning.
They have delivered production PWAs for clients including T-Mobile, Cisco, and Lockheed Martin. Their work spans customer-facing PWAs with push notification re-engagement campaigns, internal tools that field workers use in areas with intermittent connectivity, and SaaS product interfaces that are installable and function identically across iOS and Android. Their standard Lighthouse score target for production delivery is 95 or above - not as a vanity metric, but because it correlates with real improvements in bounce rate, time-on-site, and conversion. They test against real Core Web Vitals under production traffic, not against sandbox measurements.
RaftLabs' engagement model is fixed-price for scoped builds, with dedicated teams available for ongoing development. For a business that wants predictable cost, a team that has shipped real PWAs to real users, and measurable performance benchmarks as part of the delivery contract, they are the most direct fit on this list for mid-market and enterprise engagements.
Notable work: Field-worker PWA for Lockheed Martin with offline data entry and background sync, customer portal PWA for T-Mobile with offline notification queuing and cross-device installability, and internal operations tool for Cisco with progressive installation across device types and role-based offline data access. View case studies at raftlabs.co/portfolio.
Pricing signal: $29-$49/hr. Fixed-price PWA engagements typically run $30,000-$120,000 depending on offline complexity and integration scope. Delivered in 10-20 weeks with production-proven architecture.
What to watch: RaftLabs works best when clients have clear offline use cases identified upfront. Projects without a defined offline workflow still benefit from PWA architecture, but the scoping phase requires more discovery time to define the service worker strategy correctly.
Best for: Mid-market and enterprise businesses that need production PWAs with measurable performance outcomes and fixed-price delivery
Specialization: Offline-first PWA architecture, React and Next.js, cross-platform service worker design
Pricing: $29-$49/hr
Clutch rating: 4.9/5 (50+ reviews)
3. WeblineIndia
WeblineIndia is a custom software and outsourcing company headquartered in Ahmedabad, India, with a US office in Irvine, California. They develop mobile apps, web platforms, and enterprise systems for clients across many countries, operating as a broad offshore delivery partner with a US point of contact.
For a company that wants offshore custom development at a competitive rate with a US-based liaison, WeblineIndia offers a wide services catalog. As a generalist rather than a dedicated PWA studio, the relevant check is whether their portfolio includes production PWAs with real service-worker and offline architecture rather than standard responsive builds.
Notable work: None verified. WeblineIndia describes its focus as mobile, web, and enterprise-system development for a broad international client base. We did not confirm specific named PWA projects, so evaluate their portfolio directly during scoping.
Pricing signal: Project-based and not publicly disclosed. Confirm pricing directly - offline architecture and integration scope drive the number.
What to watch: WeblineIndia is a broad outsourcing firm, not a PWA specialist. For the hardest offline-first problems - sync-conflict resolution, cross-platform service-worker behavior on iOS Safari - confirm comparable production experience before contracting.
Best for: Companies wanting broad offshore custom development at a competitive rate with a US-based point of contact
Specialization: Custom software, mobile apps, web platforms, enterprise systems
Pricing: Project-based, not publicly disclosed
Rating: Profile listed; confirm before engaging
4. Cheesecake Labs
Cheesecake Labs is a Brazil-based product development studio with offices in Florianópolis and a distributed team across the Americas. Their work sits at the intersection of mobile and web - they are a React and React Native shop, which means their PWA architects understand mobile-first performance from both a native and a web perspective. For PWAs where the primary use case is mobile and the user behavior patterns look more like an installed app than a website, their cross-platform background is directly relevant.
Their PWA implementations focus on what makes the difference between a technically compliant PWA and one that users actually install and return to: navigation transitions that feel native, bottom navigation patterns with gesture recognition, offline states that present useful content rather than degraded fallbacks, haptic feedback on supported devices, and push notification timing that follows re-engagement best practices rather than generic send-on-schedule patterns. They have shipped PWAs in e-commerce, food delivery, and content subscription verticals where the competitive bar for user experience is set by native apps.
The tradeoff is team scale. Cheesecake Labs is a boutique shop - engagements with large parallel workstreams (multiple backend systems, simultaneous iOS and Android native apps alongside a PWA, complex enterprise integration requirements) can create delivery bottlenecks. They work best on focused PWA products where the scope is well-defined and the primary goal is user experience quality rather than backend complexity.
Notable work: E-commerce PWA with offline product catalog, wishlist persistence, and push notification abandoned-cart sequences, food delivery PWA with real-time order tracking and offline menu browsing, and content subscription PWA with background-sync content preloading and notification drip sequences.
Pricing signal: $50-$99/hr. PWA engagements typically run $40,000-$150,000 depending on interaction complexity and notification infrastructure. Fixed-price and T&M structures available.
What to watch: Smaller team capacity than large shops - not suited for multi-workstream enterprise engagements with heavy backend scope. Best for focused, product-first PWA builds with an emphasis on interaction quality.
Best for: Consumer-facing product companies that want an app-like PWA experience with native interaction quality
Specialization: React PWA with mobile-first UX design and React Native parity
Pricing: $50-$99/hr
Clutch rating: 4.9/5
5. Arcweb Technologies
Arcweb Technologies is a Philadelphia-based digital product firm with a strong track record in regulated industries - healthcare, energy, and financial services. For companies that need a US-based PWA partner, Arcweb is one of the few shops on this list where all team members are physically located in the US, which satisfies the vendor security requirements common in healthcare procurement, government contracting, and financial services technology audits.
Their PWA work in regulated industries carries specific requirements that general-purpose shops often underestimate. HIPAA-compliant data caching means you cannot store PHI in service workers without encryption and documented retention controls. Offline functionality for clinical environments must handle the case where a clinician edits patient data while the network is down without creating a privacy risk if the device is lost before sync completes. Accessibility compliance - WCAG 2.1 AA minimum - is a delivery requirement rather than an optional audit. Arcweb builds these requirements into the service worker architecture from day one, not as a compliance review before launch.
Their rates are higher than offshore vendors at $100-$149/hr, and typical engagements are sized accordingly. For healthcare SaaS, clinical workflow tools, energy sector dashboards, and financial services applications that require a US-based team and compliance documentation as part of the delivery contract, the premium is justified. For standard e-commerce or SaaS PWAs without compliance requirements, equivalent delivery quality is available at significantly lower cost from other vendors on this list.
Notable work: Clinical workflow PWA for a hospital network with offline patient record access and HIPAA-compliant service worker caching, energy sector dashboard PWA with real-time telemetry and offline fallback for field technicians in no-coverage zones, and financial services account management PWA with biometric authentication and compliant session management.
Pricing signal: $100-$149/hr. Typical engagements run $75,000-$250,000. US-only team with both fixed-price and T&M structures available. Compliance documentation included in delivery.
What to watch: Premium rates are not suited for early-stage or budget-constrained projects. The right choice when compliance requirements, US-only staffing, or on-site workshop availability are non-negotiable procurement requirements.
Best for: US-based enterprises in regulated industries where compliance documentation is a procurement requirement
Specialization: HIPAA-compliant PWA architecture, WCAG 2.1 AA, US-based healthcare and fintech delivery
Pricing: $100-$149/hr
Clutch rating: 4.9/5
6. Wednesday Solutions
Wednesday Solutions is a custom software and design firm based in India that builds web, mobile, TV, and IoT apps alongside generative and applied-AI and data-engineering work for startups and enterprises. Their breadth spans product engineering and data, positioning them as a full-cycle build partner rather than a PWA-only shop.
For a company that wants a single partner covering product design, multi-surface app development, and AI or data engineering, Wednesday Solutions offers a wide capability set. As a generalist rather than a dedicated PWA specialist, the relevant check is whether their portfolio includes production PWAs with real offline architecture close to your requirements.
Notable work: Per the company site, their client work includes PharmEasy and Rapido. We did not independently verify these engagements or their PWA-specific scope, so review the relevant case studies directly during scoping.
Pricing signal: Not publicly listed; project-based. Request a quote - offline data architecture and integration scope will drive the number.
What to watch: Wednesday Solutions is a broad product, AI, and data firm rather than a PWA specialist. For sophisticated offline-first conflict resolution or iOS Safari service-worker edge cases, confirm comparable production PWA experience before contracting.
Best for: Startups and enterprises wanting a single partner across web, mobile, TV, IoT, AI, and data engineering
Specialization: Custom software and design, web/mobile/TV/IoT apps, generative and applied AI, data engineering
Pricing: Project-based, not publicly listed
Rating: Profile listed; confirm before engaging
7. Yeti
Yeti is a digital product studio based in Truckee, California, that designs and builds web and mobile apps, connected devices, and e-commerce and Web3 products. Their positioning is a design-led product studio rather than an enterprise digital-transformation program shop.
For a company that wants a US-based product studio with a design-forward approach and experience across connected devices and commerce, Yeti fits that shape. As a general product studio rather than a dedicated PWA specialist, the relevant check is whether their portfolio includes production PWAs with real offline architecture close to your requirements.
Notable work: Per the company site, their clients include Google, Netflix, PlayStation, and MIT. We did not independently verify these engagements or their PWA-specific scope, so review the relevant case studies directly during scoping.
Pricing signal: Not publicly listed; project-based. Request a quote - offline data architecture and integration scope will drive the number.
What to watch: Yeti is a general digital product studio, not a PWA or enterprise-program specialist. For a PWA whose core challenge is offline-first architecture or multi-workstream enterprise integration, confirm the relevant experience before committing.
Best for: Companies wanting a US-based, design-led product studio across web, mobile, connected devices, and commerce
Specialization: Digital product design and build, web and mobile apps, connected devices, e-commerce and Web3
Pricing: Project-based, not publicly listed
Rating: Profile listed; confirm before engaging
8. Yudiz Solutions
Yudiz Solutions is a development studio based in Ahmedabad, India, that builds games, fantasy-sports platforms, mobile and web apps, and AR/VR/AI solutions. Their catalog leans toward interactive and gaming-adjacent products alongside general app development.
For a company whose product has a gaming, fantasy-sports, or immersive-media angle and wants a single studio covering design and build, Yudiz offers relevant breadth. As a generalist rather than a dedicated PWA specialist, the relevant check is whether their portfolio includes production PWAs with real service-worker and offline architecture close to your requirements.
Notable work: Per the company site, Yudiz developed Fansportiz, a fantasy-sports product of their own. We did not independently verify specific named client PWA projects, so review their portfolio directly during scoping.
Pricing signal: Not publicly listed; project-based. Request a quote - offline data architecture and integration scope will drive the number.
What to watch: Yudiz is a games and app development studio, not a PWA specialist. For a build whose core challenge is offline-first architecture or cross-platform service-worker behavior, confirm comparable production PWA experience before contracting.
Best for: Companies with gaming, fantasy-sports, or immersive-media products wanting a single studio for design and build
Specialization: Games, fantasy-sports platforms, mobile and web apps, AR/VR/AI
Pricing: Project-based, not publicly listed
Rating: Profile listed; confirm before engaging
Side-by-side comparison
| Company | Primary strength | Typical engagement | Pricing |
|---|---|---|---|
| Umbrella IT | Custom web/mobile development plus tech staffing | Quote-based | Not public |
| RaftLabs | Offline-first PWA architecture with measurable Lighthouse performance | $30K-$120K, 10-20 weeks | $29-$49/hr |
| WeblineIndia | Offshore custom web/mobile with US point of contact | Quote-based | Not public |
| Cheesecake Labs | Mobile-first consumer PWA with app-like interaction quality | $40K-$150K, 12-20 weeks | $50-$99/hr |
| Arcweb Technologies | US-based compliance-aware PWA for regulated industries | $75K-$250K, 20-36 weeks | $100-$149/hr |
| Wednesday Solutions | Web/mobile/TV/IoT plus AI and data engineering | Quote-based | Not public |
| Yeti | US design-led studio, web/mobile, connected devices, commerce | Quote-based | Not public |
| Yudiz Solutions | Games, fantasy-sports, mobile/web, AR/VR/AI studio | Quote-based | Not public |
The question that separates the right PWA company from the wrong one
Most PWA development proposals will mention service workers, offline support, and Lighthouse scores. Almost none will tell you what happens when a user spends three hours editing a form in your field operations tool while driving through a dead zone - and then reconnects to find that a colleague updated the same record from the office.
That is the question that matters.
Part 1: Does the service worker strategy match the application's actual data patterns?
A cache-first strategy that makes sense for a marketing site is wrong for a logistics tool where every piece of data is time-sensitive. A network-first strategy with a cache fallback that works for a SaaS dashboard is wrong for a field-worker tool where the user cannot wait for a 30-second timeout before the cached version loads. The right cache strategy depends on how frequently data changes, how long stale data is acceptable, which operations must succeed offline versus which can be deferred, and how conflicts between local and remote state are resolved when sync occurs. A company that can describe your application's offline data model in their proposal has thought through the actual problem. A company that says "we will use Workbox" has named a tool, not described a solution.
Part 2: Is there an explicit iOS Safari plan?
iOS Safari imposes PWA restrictions that Android Chrome does not. Service worker storage is capped and can be cleared by the operating system under low-storage conditions without warning. Push notifications require iOS 16.4 or later, a home-screen installation, and an explicit user opt-in through a prompt that the developer must trigger - there is no native browser-level installation banner on iOS. A PWA that assumes Android Chrome behavior and tests only in Chrome DevTools will ship with broken behavior on roughly half of all mobile users. Ask any company you are evaluating what their iOS-specific testing protocol is, how they handle the push notification gap for users below iOS 16.4, and what their experience is with the WebKit service worker implementation's specific quirks. A vague answer means they have not shipped a cross-platform PWA in production.
Part 3: Can they produce production Lighthouse scores?
A Lighthouse score from a pre-launch sandbox is not evidence of production quality - it tells you what the app can score when the server is fast, cache states are fresh, and no real users are competing for resources. Production Lighthouse scores captured under real traffic, measured through PageSpeed Insights against a live URL, are where the gap between demo and delivered quality shows. Ask specifically for a PageSpeed Insights link from a live app the company has shipped, and ask when the app launched, what the score was at launch, and what it is today. A company that can answer these questions specifically has shipped a production PWA. A company that offers a screenshot from a development environment has not.
The PWA company you want is the one that has already solved the problems your team does not know exist yet.
"Progressive web apps are not a technology checkbox - they are an architecture commitment. The shops that ship real PWAs design the service worker strategy around the application's data model before a single component is written. The shops that ship technically compliant but practically unremarkable PWAs add the service worker as a post-launch afterthought and wonder why their Lighthouse scores do not hold in production."
Ashit Vora, Founder, RaftLabs
According to Google's Web.dev research and third-party e-commerce studies, well-optimized PWAs reduce page load times by 60-70% compared to their pre-PWA equivalents, and retailers that adopted offline-first PWA architecture have reported bounce rate reductions of 20-30% alongside measurable conversion improvements. These results hold only when the service worker architecture is tuned to the application's real data access patterns. Adding a manifest file to an existing responsive site and calling it a PWA produces none of these outcomes.
The verdict
The right PWA development company depends on what the PWA is for, what your offline use cases are, and how much of the delivery process you want to manage internally.
Use Umbrella IT when you want a single vendor for custom web and mobile development plus flexible engineering staffing - a generalist to vet for real PWA offline architecture.
Use RaftLabs when you need a production PWA with offline-first architecture, documented Lighthouse 95+ scores, and a fixed-price engagement in the $30,000-$120,000 range delivered in 10-20 weeks. Their track record with enterprise clients and their default offline-first design stance make them the most direct fit for mid-market and enterprise businesses with real offline use cases who want a vendor, not a talent marketplace.
Use WeblineIndia when you want broad offshore custom development at a competitive rate with a US-based point of contact - confirming their PWA offline experience during scoping.
Use Cheesecake Labs when the PWA needs to feel like a native mobile app: bottom navigation, gesture interactions, and an experience that users cannot distinguish from something downloaded from an app store.
Use Arcweb Technologies when you are in healthcare, energy, or financial services, your procurement requires a US-based team, and compliance documentation is a delivery requirement rather than a preference.
Use Wednesday Solutions when you want a single partner across web, mobile, TV, IoT, AI, and data engineering - a generalist to vet for production PWA offline work.
Use Yeti when you want a US-based, design-led product studio across web, mobile, connected devices, and commerce - confirming their PWA offline architecture experience during scoping.
Use Yudiz Solutions when your product has a gaming, fantasy-sports, or immersive-media angle and you want a single studio for design and build - confirming their PWA offline experience during scoping.
For mid-market businesses with genuine offline use cases and a need for production-proven, fixed-price delivery, RaftLabs offers the clearest value on this list. For consumer-facing products where interaction quality is the competitive differentiator, Cheesecake Labs is the stronger choice.
RaftLabs ships production PWAs with offline-first architecture and Lighthouse 95+ scores. 4.9/5 on Clutch. Talk to a founder about your project.
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Frequently asked questions
- A real PWA includes four capabilities that a standard responsive web app does not: a service worker that caches assets and API responses for offline use, a web app manifest for installability and home screen addition, push notification support for re-engagement, and background sync to handle actions taken while offline. A responsive web app that loads correctly on mobile is not a PWA. The core distinction is offline capability - a PWA works when the user has no internet connection. Most PWA development companies can add a manifest.json in a day; the hard parts are service worker cache strategy, cache invalidation logic, and offline data conflict resolution when multiple users edit the same records.
- A simple PWA (static content, basic offline caching, installable) costs $15,000-$40,000. A production PWA with dynamic data, background sync, push notifications, and cross-platform testing costs $40,000-$100,000. A complex enterprise PWA with offline-first architecture, multi-tenant data isolation, and deep backend integration costs $100,000-$250,000. The biggest cost driver is offline data architecture - how the app handles reads and writes when disconnected and how conflicts are resolved on reconnection. Companies that quote PWA projects without discussing offline data architecture have not scoped the real work.
- A simple PWA takes 6-10 weeks to build, test, and deploy. A production PWA with offline-first architecture, push notifications, and cross-platform testing takes 12-20 weeks. Complex enterprise PWAs with multiple backend integrations take 24+ weeks. The timeline is heavily influenced by the complexity of the offline data model and the number of target platforms - iOS Safari has significant PWA limitations compared to Android Chrome, and testing across both adds meaningful time to any cross-platform engagement.
- This is the hardest architectural problem in offline-first development and the one that most cleanly separates experienced vendors from those who have built demos rather than production applications. If a user edits a record offline and the same record is updated by someone else while they're disconnected, the vendor needs a clear position on how that gets resolved: last-write-wins (which discards one user's changes silently), field-level merge (which requires knowing which fields matter and in what order), operational transforms (used in collaborative editors), or a user-facing conflict resolution UI that hands the decision back to the user. Each approach has tradeoffs, and the right one depends on the application - but a vendor with no position on this has not designed a real offline data layer.
- Push notification delivery is not uniform across operating systems and browsers: Android Chrome routes through Firebase Cloud Messaging, iOS requires Apple Push Notification service via Safari's Web Push implementation (available only from iOS 16.4 and later, and only from installed PWAs), and desktop Chrome and Firefox each use different push service implementations with different delivery guarantees. A vendor that tests push notifications only in Chrome on a development machine hasn't tested most of the real delivery paths. Ask which testing environments they use, whether they test on real iOS devices, how they handle delivery failures and retry logic, and what their delivery-rate reporting looks like across platforms in production.
- Service workers cache both application assets and API response data, and the browser's service worker lifecycle requires the previous worker to finish all active sessions before a new one activates - so a poorly handled update process can leave users running a stale application version for days or weeks after a release. Ask whether the vendor uses versioned cache keys with explicit cache eviction on activation, whether they implement a 'new version available' reload prompt, and how they measure time-to-adoption after a deployment. A vendor that can describe this with specifics has shipped a production PWA into a real user base, not just a demo.
- Three common mistakes: First, accepting a Lighthouse score from a pre-launch sandbox - real PWA performance is measured under production traffic with real cache states, and sandbox scores are routinely 10-20 points higher. Second, not asking specifically about iOS Safari - it has stricter service worker storage limits, no persistent push notifications until iOS 16.4, and different installability behavior than Android. A PWA that works on Android Chrome but not iOS Safari has failed roughly half of mobile users. Third, confusing offline-capable with offline-first - an offline-capable PWA shows a cached version when disconnected; an offline-first PWA is architected so network access is an enhancement, not a requirement.
- RaftLabs is a strong fit for mid-market businesses and enterprises that need production PWAs with measurable performance outcomes. They have shipped PWAs for T-Mobile, Cisco, and Lockheed Martin with documented Lighthouse scores above 95. Their approach is offline-first by default - service workers are architected around the app's specific data access patterns, not added as an afterthought. Pricing is $29-$49/hr with fixed-price engagements available and production delivery in 10-20 weeks. They are less suited to projects that require a US-only team or on-site discovery workshops.
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