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Nango is an open-source integrations platform that handles OAuth, proxying, and per-tenant data syncs for 700+ APIs. It is the go-to runtime for engineering teams that want to write integration logic in TypeScript instead of fighting another black-box iPaaS.
Nango is an open-source platform for building product integrations — managed OAuth, an authenticated proxy, and a TypeScript runtime for syncs and actions across 700+ APIs. We rate it 82/100 — the most code-first, developer-friendly choice in the iPaaS / unified-API space if your team is happy writing TypeScript and wants the integration logic in version control rather than a third-party visual builder.
Nango is a Y Combinator-backed (W23) open-source integrations platform created by Bastien Beurier and Robin Guldener. The first commit on the public NangoHQ/nango repository landed in , and as of the project has crossed 7,270+ GitHub stars, 710+ forks and ships under the Elastic License v2. The latest tagged release at the time of writing is v0.70.1, published on .
The pitch is simple: every B2B SaaS eventually drowns in integration work — OAuth flows, token refresh, rate limits, per-customer data syncs, webhook ingestion. Off-the-shelf iPaaS tools either lock you into a low-code builder or charge per-connection in ways that punish growth. Nango exposes three primitives — Auth, Proxy, and Functions — and lets you write integration code as plain TypeScript that runs on Nango's production infrastructure (Temporal-backed runtime, per-tenant isolation, automatic retries). It is used in production by Replit, Ramp, Mercor, Typeform and Semgrep, among others.
nango.get/post/put call per request — Nango injects the right credentials, retries on 429s, normalizes rate-limit headers and returns the raw response. No more bespoke fetch wrappers per integration.nango deploy. The runtime gives you per-tenant isolation, scheduled execution, automatic retries, structured logs and a built-in record store for sync state.docker compose up. Free self-host has a limited feature set; Cloud and Enterprise Self-Hosted unlock everything, with SOC 2 Type II, HIPAA and GDPR available on paid plans.
Sentiment across G2, the Y Combinator launches, and developer threads is broadly positive on developer experience and notably mixed on pricing. On G2, reviewers consistently praise the speed of going from zero to a working OAuth flow ("less than an hour" is a recurring phrase) and the responsiveness of the founding team in their public Slack.
The most common criticism is the connection-based meter. Several reviewers flag that the Free tier's 10 connections and the Starter tier's 20 connections feel low relative to the price jump, and that for a multi-tenant SaaS each end-user counts as a separate connection — which can make the bill scale faster than expected. Engineering posts on Hacker News point to a real maintenance reality: every integration is TypeScript code you write and own, which is a feature for teams that want control and a downside for teams hoping for a fully managed unified API. Competing platforms like Merge and Truto have published direct comparisons highlighting exactly this trade-off.
Nango uses a free tier plus tiered, usage-based pricing. All tiers include two-way syncs & RAG, MCP / tool-calling and API unification — the difference is volume, environments, security/compliance, and turnaround on requesting new APIs.
| Plan | Price | Key Limits |
|---|---|---|
| Free | $0/mo | 10 connections, 100k proxy requests, 100k function runs, 2 environments. No SOC 2. |
| Starter | from $50/mo | 20 connections then $1 each, 200k proxy requests, 3 environments, SOC 2 Type II. |
| Growth | from $500/mo | 100 connections then $1 each, 1M proxy requests, 10 environments, RBAC, custom branding, logs export. SAML SSO and HIPAA available as add-ons. |
| Enterprise | Custom | Unlimited environments, 2-day new-API turnaround, SAML SSO, HIPAA, self-hosting and SLAs included. |
There is no traditional "14-day trial" — the Free plan is permanent and is how most teams pilot. Self-hosting is also free with a reduced feature set.
Best for: startup and scale-up engineering teams shipping a B2B SaaS that needs 5–50 native integrations, AI-product teams that want their agents to call real customer APIs (HubSpot, Slack, Google Drive, GitHub) over MCP, and any team that wants to keep integration logic in their own Git repository instead of a third-party low-code builder.
Not ideal for: non-technical operators who need a Zapier-style visual builder, teams that explicitly want a fully normalized unified-API schema (Merge or Finch are closer to that), and very high-volume tenants where the per-connection meter would dominate cost — in that case talk to Nango about Enterprise rather than staying on Growth.
Pros:
Cons:
Composio takes the opposite approach — a managed catalog of 250+ tools designed primarily as ready-made AI-agent skills, with less code ownership. Merge is the established unified-API option (HRIS, ATS, accounting) and is closer to plug-and-play but offers far less control over integration logic. Paragon and Workato sit further toward the embedded-iPaaS end with visual builders. If you are mostly looking for OAuth and don't need syncs, hand-rolling with Stytch's connected-apps feature can be cheaper, though much narrower.
Yes — with one caveat about pricing. If you are a B2B SaaS or AI-product engineering team that wants integration logic to live in your own Git repo, Nango is the most credible open-source option in 2026 and is the rare iPaaS-adjacent tool whose code-first stance survives contact with production. The 82/100 rating reflects the genuinely excellent core platform, mature 700+ API catalog and active OSS community, balanced against a connection-based pricing model that punishes high-tenant SaaS and a still-real maintenance burden as your integration count grows past 20–30.
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