How we make this list: we compare pricing pages, product documentation and public user reviews. Ratings come from G2, Capterra or Trustpilot, with the date we checked them.
Key takeaways
- This list ranks companies you hire to build a cross platform app, not apps you install, so the comparison covers frameworks, process, and fit.
- Cross platform development means one codebase for Android and iOS, which usually cuts cost and time compared with two native apps.
- Flutter and React Native are the two leading frameworks, while Kotlin Multiplatform suits teams that want shared logic with native screens.
- Netguru and BairesDev suit large, complex builds with big teams, while Droids On Roids and LeanCode suit focused Flutter and React Native work.
- itCraft stands out for long track records, with more than 2,250 projects reported, and strong QA and backend support.
- Prices are project based, so compare proposals on scope, team, and deliverables, not on hourly rate alone.
Quick comparison
| Tool | Best for | Starting price | Free plan |
|---|
 Netguru | Large cross platform builds | See website | No |
 Droids On Roids | Flutter and React Native delivery | See website | No |
 itCraft | Long track record and QA depth | See website | No |
 LeanCode | Flutter and React Native MVPs | See website | No |
 BairesDev | Rapid scaling with large teams | See website | No |
 Miquido | Product design and development | See website | No |
 Cheesecake Labs | Startup cross platform apps | See website | No |
 WillowTree | Enterprise cross platform experiences | See website | No |
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We review this list regularly. Vendors can request a listing, send updated pricing or ask about featured placement.
#1Netguru
Best for: Large cross platform builds4.3/5 on
G2 (2 reviews, checked Oct 2026)
Visit netguru.com
Starting priceSee website
Free planNo
Netguru is a large digital product company with deep cross platform experience in Flutter and React Native, plus web and backend engineering to support the app. Its teams cover product discovery, design, development, testing, and growth, which suits scale ups and enterprises that need a partner for the long term rather than a single release.
Size brings process overhead and enterprise level budgets, so a tiny MVP may be better served by a boutique firm. For a complex cross platform product with many integrations, a large user base, or a long roadmap, Netguru is a dependable choice with the team depth to keep shipping.
What we like- Large experienced team
- Product design and engineering
- Strong for scale ups and enterprises
Watch out for- Enterprise level budgets
- Process is heavier than boutique studios
- Less suited to tiny MVPs
Starting priceSee website
Free planNo
Droids On Roids is a Poland based company focused on native and cross platform development, including Flutter and React Native. It builds market ready mobile apps and APIs with in house UX design, QA, and performance teams, serving startups to enterprises with real time features, offline mode, and banking grade security for finance and health apps. Public listings report hourly rates of $50 to $100 and a minimum project budget from $25,000.
The firm is known for transparent communication and fast delivery, and it ranks regularly in industry directories. The Poland base means timezone planning for US clients, though many US companies already work with its team. For a Flutter or React Native app where performance and security matter, Droids On Roids is a strong pick.
What we like- Flutter and React Native focus
- In house UX, QA, and performance teams
- Healthcare and fintech experience
Watch out for- Hourly rates reported at $50 to $100
- Minimum project budget reported from $25,000
- Poland based team means timezone planning
Starting priceSee website
Free planNo
itCraft delivers full stack mobile and web development, including cross platform solutions in Flutter and React Native, with a large track record of more than 2,250 projects across enterprise and startup clients. Its services include user focused design, marketplaces, education tools, and logistics systems, supported by strong QA engineering and backend teams, plus MVP development, maintenance, and DevOps.
Public listings report hourly rates of $40 to $80 and a minimum project budget from $20,000, and the firm notes GDPR compliance and ISO certification. That compliance focus suits regulated or enterprise work. For a cross platform app that needs solid QA, backend depth, and a partner with a long history, itCraft is a safe choice.
What we like- More than 2,250 projects reported
- Strong QA and backend teams
- GDPR compliant and ISO certified
Watch out for- Hourly rates reported at $40 to $80
- Minimum project budget reported from $20,000
- Large firm means process overhead
Starting priceSee website
Free planNo
LeanCode is a US and Warsaw based company focused on Flutter and React Native development, with MVP delivery and hybrid app expertise. Its pitch is efficient single codebase solutions for fast time to market, which suits startups that need to validate an idea on both platforms without funding two native teams.
The team is smaller than enterprise firms, and US clients should plan around timezones, though the firm works regularly with US companies. For a startup MVP or a first cross platform release on a tight timeline, LeanCode is a practical and focused partner.
What we like- Flutter and React Native focus
- Efficient single codebase delivery
- Fast time to market
Watch out for- Smaller team than enterprise firms
- US clients need timezone planning
- Less suited to huge enterprise programs
Starting priceSee website
Free planNo
BairesDev is a large technology company with a talent pool of around 4,000 people across the US and Latin America, offering React Native and Flutter development, staff augmentation, and modernization. Its scale lets it staff large or fast growing projects quickly, which suits enterprises and scale ups that need many engineers at once.
Scale has a cost: account management matters more, and the experience feels less boutique than a small studio. For a complex enterprise build that needs to scale a team fast, BairesDev is one of the few firms that can do it without a long hiring delay.
What we like- Talent pool of around 4,000 people
- Rapid scaling
- React Native and Flutter plus staff augmentation
Watch out for- Large firm means account management matters
- Less boutique attention
- Enterprise style process
Starting priceSee website
Free planNo
Miquido is a product development company that pairs strategy and design with mobile engineering, including cross platform apps. Its work covers consumer and business apps, with growing strength in AI and data features, and it serves both startups and larger companies.
Premium positioning means smaller budgets may struggle, and pure staff augmentation is not its strongest model. For a company that wants a partner to shape the product and build it, rather than just supply engineers, Miquido is a strong shortlist option.
What we like- Product strategy and design plus engineering
- AI and data features
- Startup and enterprise mix
Watch out for- Premium positioning
- Less suited to pure staff augmentation
- Project minimums vary
Starting priceSee website
Free planNo
Cheesecake Labs delivers cross platform mobile apps in React Native and Flutter, with product design, development, testing, and ongoing support. Its startup friendly process suits founders who need to ship on Android and iOS together, validate with real users, and iterate quickly.
The firm is smaller than enterprise agencies, and its cross platform focus means native only depth is thinner. For a startup that wants one team to cover both platforms from the start, Cheesecake Labs is a practical partner with a clear cross platform track record.
What we like- React Native and Flutter delivery
- Startup friendly process
- Full lifecycle support
Watch out for- Smaller than enterprise firms
- Cross platform focus means less native depth
- Availability varies
Starting priceSee website
Free planNo
WillowTree builds mobile and digital experiences for enterprises, including cross platform apps that connect to complex backend systems and customer platforms. Its teams cover strategy, design, engineering, and ongoing support, with a focus on polished, reliable apps for large organizations.
Enterprise budgets and heavier process make WillowTree a poor fit for a tiny MVP, but for a large company that needs a cross platform app tied to many internal systems, it is one of the safest choices. Its design quality also suits customer facing apps where brand experience matters.
What we like- Enterprise mobile expertise
- Connected experiences
- Design and engineering depth
Watch out for- Enterprise budgets
- Heavier process than boutique studios
- Less suited to tiny MVPs
How we chose
We ranked companies by cross platform framework depth, portfolio evidence, process quality, and fit for different buyers, favoring firms with public track records in Flutter or React Native. We gave extra weight to companies that cover design, QA, and backend work alongside mobile code, since a cross platform app still needs a solid server side and testing discipline. Rate ranges come from public directory listings checked in October 2026 and vary by project, so starting prices are listed as See website.
Buying guide
Start by choosing your framework with your team, not by hype. Flutter suits visually rich apps with custom interfaces and a single design system. React Native suits teams with JavaScript experience and apps that share code with a web product. Kotlin Multiplatform suits teams that want shared business logic with fully native screens, though the talent pool is smaller.
Next, compare proposals on equal scope. Ask each firm for the same feature list, platforms, testing plan, launch support, and maintenance terms, and check who owns the code and accounts. A low rate with a thin testing plan often costs more later than a higher rate with proper QA.
Finally, test the working relationship early. Cross platform projects run for months, and communication quality decides success as much as framework choice. Ask for the actual team, check references in your industry, and run a small paid discovery or first milestone before committing to a full build.
Frequently asked questions
Is cross platform development cheaper than native?
Usually yes for two platforms, since one codebase covers Android and iOS and one team ships both. Savings shrink when an app needs deep platform specific features, in which case native development may fit better.
Should I choose Flutter or React Native?
Flutter suits visually rich apps with custom interfaces and consistent design across platforms. React Native suits teams with JavaScript skills and products that share code with a web app. Both are proven for most business and consumer apps.
What is Kotlin Multiplatform?
Kotlin Multiplatform shares business logic across Android and iOS while keeping fully native screens on each platform. It suits teams that want code sharing without giving up native interface quality, though fewer firms specialize in it.
How long does a cross platform app take to build?
Simple apps can take two to four months, while complex apps with accounts, payments, and integrations often take six months or more. Discovery, design, testing, and store review all add time.
Who owns the code after a cross platform project?
Ownership should be agreed in writing before work starts. Most reputable firms hand over code, accounts, and documentation at launch, but confirm this in the contract rather than assuming it.
Sources we checked (0)
Is your product missing or out of date?
We review this list regularly. Vendors can request a listing, send updated pricing or ask about featured placement.
Shihab Mia · Founder, Rankite
Shihab has 5+ years in B2B and SaaS SEO. He writes Rankite's software buying guides from pricing pages, documentation and public user reviews. More about Shihab.