Pick an API development company that is great at boring stuff. Clean docs. Safe data flow. Fewer mystery errors. Fast support. APIs are now core business plumbing, and Postman says more than 35 million developers use its platform [source: Postman].
TLDR: The best API development companies for software integration projects are usually EPAM, ScienceSoft, Itransition, BairesDev, ELEKS, Netguru, Ciklum, Thoughtworks, and Globant. Pick based on your project type, not just brand size. For example, a retailer connecting Shopify, SAP, and Salesforce may cut order handling time by 30% to 50% with a good API layer and fewer manual exports. Gartner has reported that API use keeps growing across digital business teams [source: Gartner].
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Why API integration projects get messy fast
An API project sounds simple at first.
“Just connect the apps.” Famous last words.
Then the CRM uses one data format. The billing app uses another. The warehouse tool sends weird error codes. Someone hardcoded a token in 2019. Fun.
The catch is… weak API work does not fail loudly. It fails slowly. A sync takes 12 seconds longer than usual. A customer record duplicates. A payment status gets stuck. Then support gets blamed.
Good API companies prevent that pain. They build clear contracts between systems. They add monitoring. They document everything. They test edge cases. They make sure humans do not need to fix the same bug every Monday.
Best API development companies for integration projects
1. EPAM Systems
Best for: large enterprises and complex platforms.
EPAM is strong when a project has many moving parts. Think banks, healthcare networks, retail groups, and global SaaS products. They can handle API architecture, cloud work, data migration, and security reviews.
They are not the cheapest option. No shock there. But they are a safe pick when failure would be very expensive.
- Good at: enterprise API platforms, cloud integration, modernization.
- Use them for: large internal systems and customer-facing platforms.
- Watch out for: bigger teams can mean more meetings.
2. ScienceSoft
Best for: practical business integrations.
ScienceSoft is a good fit for companies that need solid work without drama. They often work with CRM, ERP, ecommerce, healthcare, and financial systems.
They are useful when your team needs both advice and hands-on delivery. They can audit current systems. Then they can design APIs, build middleware, and set up monitoring.
- Good at: business system integration, API testing, legacy upgrades.
- Use them for: connecting old apps to newer cloud tools.
- Watch out for: scope needs to be clear from day one.
3. Itransition
Best for: custom software and integrations in one package.
Itransition is useful when you do not just need APIs. You also need dashboards, admin panels, portals, or reporting tools. Their teams can build the software and the connections around it.
This helps if you are tired of having one vendor build the app and another vendor blame the API. That game gets old fast.
- Good at: custom platforms, middleware, SaaS integration.
- Use them for: connected business apps and data-heavy systems.
- Watch out for: ask for detailed API documentation samples.
4. BairesDev
Best for: fast team scaling.
BairesDev is a strong option when you need developers quickly. They work with nearshore teams, which can help with time zones for US companies.
They can support API builds, backend work, cloud services, and integration testing. They are a good fit if your internal team is overloaded and needs help now.
- Good at: staff augmentation, backend development, cloud APIs.
- Use them for: speeding up delivery without hiring full-time.
- Watch out for: keep ownership of architecture decisions.
5. ELEKS
Best for: product engineering with strong backend needs.
ELEKS works well for companies building serious digital products. They can help with API design, data systems, cloud platforms, and security planning.
They are often a good match for logistics, finance, insurance, and enterprise software. If your integration needs real product thinking, ELEKS should be on your list.
- Good at: API strategy, product platforms, data integration.
- Use them for: high-value software products with many users.
- Watch out for: align early on budget and delivery speed.
6. Netguru
Best for: startups and polished digital products.
Netguru is a good choice when user experience matters as much as backend logic. They can build APIs, mobile apps, web platforms, and admin tools.
They are a smart pick for fintech, edtech, marketplaces, and SaaS startups. Their style fits teams that want a clean product, not just a working connection.
- Good at: startup products, app integrations, product design.
- Use them for: API-backed apps with a friendly interface.
- Watch out for: advanced enterprise integration may need extra planning.
7. Ciklum
Best for: cloud-based platforms and ecommerce.
Ciklum has strong engineering teams for retail, travel, finance, and product companies. They can help connect checkout systems, inventory tools, payment providers, CRMs, and analytics apps.
This is useful for ecommerce firms. One broken API can mean lost orders. Nobody wants that little horror show.
- Good at: ecommerce APIs, cloud engineering, platform support.
- Use them for: online stores and transaction-heavy systems.
- Watch out for: set clear service level targets.
8. Thoughtworks
Best for: strategy-heavy digital transformation.
Thoughtworks is known for engineering culture and technical consulting. They are a fit when your API project is part of a bigger change.
Maybe you are breaking a monolith into services. Maybe you are building an internal API program. Maybe your release process is painfully slow. Thoughtworks can help design better systems and better team habits.
- Good at: architecture, microservices, engineering practices.
- Use them for: complex change across teams.
- Watch out for: they may challenge your current process.
9. Globant
Best for: big brand digital projects.
Globant is a strong pick for customer-facing platforms, media systems, retail tools, and large digital programs. They can blend API work with UX, cloud, data, and AI features.
They make sense when the API project affects the full customer journey. Not just a back-office sync.
- Good at: digital products, customer platforms, cloud APIs.
- Use them for: large digital programs with many teams.
- Watch out for: pricing may suit bigger budgets.
How to choose the right API development company
Do not pick the biggest logo. Pick the best fit.
Use this quick checklist:
- Ask for API docs. Bad docs are a warning sign.
- Check security habits. Ask about OAuth, rate limits, encryption, and secret storage.
- Request monitoring plans. You need alerts before users complain.
- Talk about failure. What happens when a third-party API goes down?
- Confirm ownership. You should own code, docs, and credentials.
- Start small. Test them with one integration first.
Simple matching guide
- Enterprise systems: EPAM, Thoughtworks, Globant.
- CRM, ERP, and legacy tools: ScienceSoft, Itransition.
- Fast developer support: BairesDev, Ciklum.
- Startup products: Netguru, ELEKS.
- Ecommerce integrations: Ciklum, ScienceSoft, Globant.
Final pick
If you want the safest broad choice, start with ScienceSoft or Itransition. They fit many common integration projects.
If your project is huge, start with EPAM or Thoughtworks. If you need speed, try BairesDev. If the API powers a polished app, put Netguru and ELEKS on the shortlist.
The best API partner will make your systems feel boring. That is the goal. Boring means stable. Stable means fewer angry tickets. And fewer angry tickets means everyone gets to enjoy their coffee while it is still hot.