Independent · sourced · Updated June 2026
Best API Documentation Tools (2026)
The cheapest api documentation tools is Apidog at $0/mo. 7 offer a free tier (Apidog, GitBook, Mintlify). This page compares 10 options on entry price, free tier, HIPAA/SOC 2 and best-for — every figure linked to its source, updated June 2026.
10 options compared on price, free tier, compliance and fit — ranked cheapest-first. Every figure links to the vendor's own page and the date we captured it; quote-only tiers show “—”, never a guess.
Key takeaways
- Cheapest: Apidog at $0/mo (Free).
- Typical paid price: from $10/mo, median $60.50/mo, up to $250/mo — across 8 with published pricing.
- Free tier: Apidog, GitBook, Mintlify, ReadMe, Scalar, Stoplight, Theneo.
- Tracked: 10 vendors, data current through 2026-06-15.
Comparison
| # | API Documentation Tool | Entry price | Free | HIPAA | SOC 2 | Best for | Source |
|---|---|---|---|---|---|---|---|
| 1 | Apidog | $0/mo Free | Yes | — | Yes | API-design | apidog.com |
| 2 | GitBook | $0/mo Free | Yes | — | Yes | knowledge-base | gitbook.com |
| 3 | Mintlify | $0/mo Starter | Yes | — | Yes | developer-documentation | mintlify.com |
| 4 | ReadMe | $0/mo Starter | Yes | — | Yes | developer-portals | readme.com |
| 5 | Scalar | $0/mo Free | Yes | — | Yes | open-source-API-docs | scalar.com |
| 6 | Stoplight | $0/mo Free | Yes | — | — | API-design | stoplight.io |
| 7 | Theneo | $0/mo Starter | Yes | — | Yes | AI-assisted-API-docs | theneo.io |
| 8 | Redocly | $10/mo Pro | No | — | Yes | API-documentation | redocly.com |
| 9 | Bump.sh | $50/mo Basic | No | — | No | API-changelog | bump.sh |
| 10 | Document360 | — | No | — | Yes | knowledge-base | quote-only |
Prices are the lowest published self-serve monthly rate as captured on the linked source. Annual-billing and usage details are on each vendor's record in our open dataset.
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Frequently asked questions
What is the cheapest api documentation tools?
Apidog has the lowest published entry price at $0/mo (Free), as of 2026-06-15.
How much does api documentation tools cost per month?
Across the 8 api documentation tools with published paid pricing, the median starting price is $60.50/mo, ranging from $10/mo to $250/mo, as of 2026-06-15. 7 also offer a free tier. 1 are quote-only.
Which api documentation tools have a free plan?
Apidog, GitBook, Mintlify, ReadMe, Scalar, Stoplight, Theneo offer a free tier.
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How we compiled this
Pricing re-verified via WebFetch on each vendor's official pricing page (readme.com/pricing, stoplight.io/pricing, redocly.com/pricing, bump.sh/pricing, theneo.io/pricing, mintlify.com/pricing, gitbook.com/pricing, scalar.com/pricing) on 2026-06-15. Apidog (apidog.com/pricing) and Document360 (document360.com/pricing) render pricing client-side and returned no extractable price data; Apidog plan prices corroborated via plans.apis.io and g2/trustradius; Document360 confirmed quote-only since late 2024 via g2, checkthat.ai, and happysupport.ai (all monthlyUsd left null — no number invented). Compliance re-checked on official security/trust pages: theneo.io/security explicitly lists SOC2+ISO27001+ISO9001+GDPR (completed, annual audits); redocly.com/security confirms SOC2 Type II + CSA STAR + GDPR DPA; bump.sh/security explicitly states NO SOC2/ISO27001 but maintains GDPR DPA; gitbook blog confirms SOC2 Type II + ISO27001; mintlify SOC2 confirmed (GDPR in progress→null); stoplight names no certifications publicly (all null); ReadMe SOC2 report + GDPR DPA confirmed, HIPAA on gated portal left null. All pages accessed 2026-06-15.
Last verified 2026-06-15. We re-check published prices and compliance on a recurring cadence and update this page when they change.
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