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
- WillowTree, now TELUS Digital, is the best app developer for leading brands, with work since 2008, a Net Promoter Score of 70 plus, and full-stack engineering at global scale.
- Fueled is the best for award-winning mobile apps, with App of the Year wins, chart-topping iOS apps, and work for Apple, Google, and the New York Times.
- Yalantis is the best for compliant and IoT app development, with 400 plus experts, 200 plus projects, and certifications from ISO 27001 to HIPAA.
- Appinventiv is the best for enterprise digital products at scale, with 3,000 plus products delivered across 35 industries.
- Intellectsoft is the best AI-first app developer, with top 1 percent talent and AI embedded across the delivery lifecycle for 40 percent faster time to market.
Quick comparison
| Tool | Best for | Starting price | Free plan |
|---|
 WillowTree (TELUS Digital) | Leading brands that want digital products at enterprise scale | See website | See website |
 Fueled | Award-winning, chart-topping mobile apps | See website | See website |
 Intellectsoft | AI-first software engineering for enterprises and startups | See website | See website |
 Yalantis | Compliant software, hardware, and IoT development | See website | See website |
 Zco | Long-running custom app development with end-to-end support | See website | See website |
 ArcTouch | Consumer apps people use every day | See website | See website |
 Netguru | Strategy-led product development with design and AI | See website | See website |
 Appinventiv | Enterprise digital products and AI-led transformation | See website | See website |
Is your product missing or out of date?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.
The best app developers
#1
WillowTree (TELUS Digital)
Best for: Leading brands that want digital products at enterprise scale
Visit willowtreeapps.com
Starting priceSee website
Free planSee website
WillowTree is now TELUS Digital, and its transition page makes the story clear: since 2008, WillowTree has partnered with the world's leading brands to design and build digital experiences that transform businesses and delight users, and now, as TELUS Digital, it combines that expertise with enhanced global capabilities. With an industry-leading Net Promoter Score of 70 plus, the same digital-native DNA remains at the core.
Services cover web and mobile app development with full-stack engineering, using agile and AI-first practices to build, test, and scale software for any platform, on time and on budget; experience design with elegant, intuitive, accessible UX; data and AI transformation; digital marketing; and product strategy and innovation with ROI-centered roadmaps. Fuel iX, its enterprise-grade AI platform, helps organizations rapidly develop, deploy, and scale AI solutions.
For leading brands that want a proven app developer with global scale, WillowTree, now TELUS Digital, is the best choice.
What we like- Since 2008, Net Promoter Score of 70 plus, full-stack engineering with agile and AI-first practices, experience design, data and AI transformation, Fuel iX enterprise AI platform
Watch out for- Enterprise scale may suit large budgets, pricing by proposal, WillowTree brand now folded into TELUS Digital
Starting priceSee website
Free planSee website
Fueled promises digital done right: sharp strategy, precision execution, and experiences that drive impact. Its mobile apps push the envelope since the iPhone App Store burst onto the scene, with App of the Year wins for clients, chart-topping apps, and work Apple itself asked Fueled to make. Case studies show the range: a community mural with AI built with Microsoft Research using ChatGPT and DALL-E, putting Google's most popular tools inside WordPress through Site Kit for 5 million site owners, gamified experiences that helped Apple grow iPhone sales among EMEA carriers, relaunching WhiteHouse.gov in 8 weeks, and unlocking an affiliate revenue stream for the New York Times on Wirecutter.
Fueled's expertise spans AI, applied since before ChatGPT, content management systems as the market leader in enterprise WordPress delivery and the top WP VIP partner since 2011, and mobile apps. Platform partnerships include Sanity, AWS, Shopify, Contentful, Webflow, Vercel, and more.
For brands that want an app with award potential, Fueled is the best choice.
What we like- App of the Year wins, chart-topping iOS and iPadOS apps, work for Apple, Google, Microsoft Research, and the New York Times, AI expertise since before ChatGPT, top WordPress VIP partner since 2011
Watch out for- Premium agency pricing by proposal, focus on high-profile work may suit larger budgets, proposal needed for pricing
#3Intellectsoft
Best for: AI-first software engineering for enterprises and startups4.4/5 on
G2 (7 reviews, checked Oct 2026)
Visit intellectsoft.net
Starting priceSee website
Free planSee website
Intellectsoft offers AI-first software engineering for business growth, with Fortune 500 enterprises and startups relying on its top 1 percent talent and AI-driven approach to design, build, and scale digital products. Its model embeds agentic AI across the development lifecycle, helping teams reach the market 40 percent faster without compromising stability, and every engagement starts with a senior architect who sets technical direction and stays accountable through delivery.
The agency works as a partner, not just a vendor, as an extension of your team with long-term partnerships, and its mid-size-by-design structure gives clients senior expertise across AI, cloud, data, and design with direct access to leadership. Tri-continental coverage across Eastern Europe, LATAM, and APAC keeps complex programs moving around the clock. Case results include a white-label CRM for dental clinics with 9 months to launch, 20 percent less admin time per patient, and 8 percent higher average clinic revenue, plus a 3D platform replacing five quoting tools with 70 percent less proposal creation time and a 40 percent shorter sales cycle.
For businesses that want AI-first engineering with senior talent, Intellectsoft is the best choice.
What we like- Top 1 percent talent, AI across the delivery lifecycle for 40 percent faster time to market, architecture-first approach, teams across Eastern Europe, LATAM, and APAC, clients include Eurostar, Jaguar, Sony, Guinness, and Walt Disney
Watch out for- Enterprise focus may suit larger budgets, pricing by proposal, mid-size agency means capacity limits at peak times
Starting priceSee website
Free planSee website
Yalantis is a compliance-first, full-cycle tech partner with deep expertise in IoT, covering software, embedded, hardware, and AI development, and building connected and compliant systems for global clients since 2008. Its numbers include 400 plus experts, 18 plus years of experience, 100 percent compliance-first architecture, 25 plus FDA and CE approvals, a 93 percent customer satisfaction score, a 91 percent Net Promoter Score, 200 plus projects delivered, and an average collaboration term of 4 plus years.
Yalantis covers the full IoT journey: devices, firmware, connectivity, cloud, and apps, with services in end-to-end IoT development, embedded development, hardware design, software development, data and AI, and Rust adoption. Standards covered include ISO 27001, ISO 9001, ISO 13485, ISO 14971, IEC 62304, IEC 62366-1, IEC 82304-1, IEC 62443, FDA 21 CFR Part 11, GDPR, SOC 2 Type II, EU Cyber Resilience Act, EU AI Act, EU MDR, HIPAA, and more. Engagement models include time and materials, fixed price, managed team, managed product, and managed service, with a free initial consultation.
For regulated industries and IoT products where compliance is non-negotiable, Yalantis is the best choice.
What we like- Compliance-first full-cycle partner since 2008, 400 plus experts, 200 plus projects delivered, 25 plus FDA and CE approvals, certifications including ISO 27001, ISO 13485, HIPAA, SOC 2 Type II, and EU MDR, free initial consultation
Watch out for- Compliance and IoT focus may suit regulated industries best, pricing by proposal, engagement models vary by project
#5
Zco
Best for: Long-running custom app development with end-to-end support
Visit zco.com
Starting priceSee website
Free planSee website
Zco is one of the leading software and mobile app development companies, known for delivering custom digital solutions to businesses of all sizes, and a trusted software development partner for over three decades, serving clients worldwide with thousands of successful applications and software products across multiple industries. Its approach combines experience, technical depth, and a customer-centric model, with a highly skilled in-house team and proven delivery from strategy and design to development and long-term maintenance.
Zco works across healthcare, finance, education, retail, logistics, entertainment, and more, following a structured process of discovery, design, coding, testing, and deployment, with dedicated project managers, rigorous QA and performance testing before every release, and full client visibility. Services include iOS, Android, React Native, and Flutter apps, AI development, staff augmentation, enterprise software, mobile games, augmented reality, and virtual reality, plus dedicated developer and team augmentation models and comprehensive post-launch support with bug fixes, enhancements, upgrades, and monitoring.
For businesses that want a steady, experienced partner for the long haul, Zco is a strong choice.
What we like- Trusted partner for over three decades, thousands of successful applications, in-house team, end-to-end support from strategy to maintenance, offices in New Hampshire, Boston, and New York
Watch out for- Pricing by proposal, traditional agency model, less AI-first positioning than newer rivals
Starting priceSee website
Free planSee website
ArcTouch helps companies create the digital products people use every day, with the tagline of lovable apps, websites, and connected experiences. It has been designing and developing digital products since the dawn of the App Store in 2008, and it is the company behind some of the world's most well-known apps, used by hundreds of millions of people every day.
Its numbers show staying power: 500 plus products, 6 years average client tenure, and a 16-year longest client relationship, with clients trusting and recommending the company. A recent testimonial describes ArcTouch helping reimagine a digital experience with a new app, extending an iconic brand's legacy and bolstering its commitment to accessibility and inclusivity. That focus on lovable, accessible products is ArcTouch's identity: apps people enjoy using, not just apps that function.
For consumer brands that want an app people love, ArcTouch is a strong choice.
What we like- Designing and developing digital products since the dawn of the App Store in 2008, 500 plus products used by millions every day, 6 years average client tenure, 16 years longest client relationship, focus on lovable apps and accessibility
Watch out for- Pricing by proposal, consumer focus may suit B2C best, homepage shows limited detail beyond positioning
#7Netguru
Best for: Strategy-led product development with design and AI4.3/5 on
G2 (2 reviews, checked Oct 2026)
Visit netguru.com
Starting priceSee website
Free planSee website
Netguru is a software development company offering strategy and transformation with roadmaps, delivery governance, and compliance by design; experience and design with human-centered UX and UI, conversion-driven journeys, customer research, AI design, and accessibility; commerce development with modern ecommerce platforms and integrations; AI, data, and engagement with personalization, analytics, and loyalty; and ops and managed services with 24/7 monitoring, DevOps, and security audits.
Results include 40 percent growth in international and GCC orders for a global retailer, a 5.0 app rating on the App Store for a major sports ecommerce platform, 60 percent more user engagement with hyper-personalization for a US proptech, and 21 percent higher conversion for a top global marketplace. Clients praise Netguru for excellence and speed together, with one calling it the best agency they have worked with so far. The company reports 2,500 plus projects delivered, 400 plus people on board, 17 plus years on the market, and a Net Promoter Score of 73.
For businesses that want strategy, design, and engineering under one roof, Netguru is a strong choice.
What we like- 2,500 plus projects delivered, 400 plus people, 17 plus years on market, Net Promoter Score 73, clients include IKEA, Volkswagen, OLX, and Careem, full services from strategy to managed services
Watch out for- Pricing by proposal, European base may suit some time zones better, full-service scope may exceed narrow app needs
Starting priceSee website
Free planSee website
Appinventiv is a digital product engineering and consulting company covering the complete lifecycle from strategy to deployment, with AI services, product development and engineering, digital transformation, consulting, and data services. Over the past decade, it has delivered 3,000 plus digital products and modernized 500 plus legacy systems across 35 industries, combining product strategy, design, and engineering under one roof rather than handing clients between separate teams.
Its homepage states typical enterprise cost and timeline ranges: generally $40,000 to $500,000 plus depending on complexity, integrations, compliance, design depth, and support, with simple projects typically taking 4 to 6 months and larger multi-feature platforms 12 to 14 months. Because exact pricing depends on scope, we list its starting price as "See website" and recommend requesting an estimate for your specific requirements. Appinventiv is a partner to OpenAI and Anthropic, collaborates with AWS, Azure, Google Cloud, Salesforce, SAP, Oracle, and more, and offers dedicated teams, staff augmentation, project-based engagement, and hybrid models, with SLAs and 24/7 post-launch support.
For enterprises that want AI-led product engineering at scale, Appinventiv is the best choice.
What we like- 3,000 plus digital products delivered, 500 plus legacy systems modernized, 35 industries, partner to OpenAI and Anthropic, clients include KFC, American Express, Domino's, Adidas, and IKEA, typical enterprise range $40,000 to $500,000 plus stated on homepage
Watch out for- Enterprise pricing may exceed small budgets, typical timelines 4 to 6 months for simple projects and 12 to 14 months for large platforms, proposal needed for exact pricing
How we chose
We compared app development agencies that are actively operating and usable in 2026, with verified homepages and real client work, not just directories or defunct studios. We checked each vendor homepage to confirm the agency exists and matches its description, and we used published results where the agency shows them. All eight agencies price by custom proposal, so we wrote "See website" rather than inventing project prices, except where Appinventiv states a typical enterprise range on its homepage. One agency from our original research list, Savvy Apps, could not be verified because its homepage address did not resolve during our check, so it was replaced by Appinventiv, whose homepage was verified. Agencies were kept only if they are actively offered and usable for app development, not just similar in name.
Pick by your project type and budget
If you are a leading brand that wants scale, start with WillowTree, now TELUS Digital. If you want an award-winning consumer app, Fueled is the best bet. If you need AI-first engineering, Intellectsoft fits. If you build regulated or IoT products, Yalantis is built for compliance. If you want a steady partner for decades, Zco has three decades behind it. If you want a lovable consumer app, ArcTouch specializes in that. If you want strategy, design, and engineering together, Netguru covers all three. And if you are an enterprise modernizing with AI, Appinventiv delivers at scale. Whatever you choose, check recent work in your industry, ask for client references, confirm who will actually work on your project, agree on ownership of code and IP, and start with a discovery phase before committing to a full build.
Frequently asked questions
What is the best app development company?
WillowTree, now TELUS Digital, is the best for leading brands, Fueled is best for award-winning consumer apps, Yalantis is best for compliant and IoT apps, Intellectsoft is best for AI-first engineering, and Appinventiv is best for enterprise digital products at scale.
How much does it cost to build an app?
All eight agencies price by custom proposal, since cost depends on scope, platforms, design, integrations, and compliance. Appinventiv states a typical enterprise range of $40,000 to $500,000 plus on its homepage, with simple projects taking 4 to 6 months and large platforms 12 to 14 months. Request proposals from at least three agencies to compare fairly.
How long does it take to build an app?
Simple apps typically take 4 to 6 months, while larger multi-feature platforms take 12 to 14 months, per Appinventiv's homepage ranges. Timelines depend on scope, design depth, integrations, testing, and app store review. A discovery phase first gives you a realistic timeline.
Should I choose a specialist or a full-service agency?
A specialist such as Yalantis suits regulated or IoT products, while a full-service agency such as Netguru or Appinventiv suits businesses that also need strategy, design, AI, and managed services alongside the app build.
What should I ask before hiring an app developer?
Ask for recent work in your industry, client references, who will work on your project, how they handle code and IP ownership, what their post-launch support covers, and how they price changes. WillowTree's Net Promoter Score of 70 plus and Yalantis's free initial consultation are useful benchmarks.
Do these agencies work with startups or only enterprises?
Both. Intellectsoft serves Fortune 500 enterprises and startups, Fueled works with startups and global brands, and Appinventiv serves enterprises while offering engagement models from dedicated teams to project-based work. Be upfront about your budget so the agency can propose a fitting scope.
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.