Free tier only
Free Alternatives to Postman (2026)
Postman has a free tier, but if it does not fit, Here are 6 API & Backend tools you can start using for free, ranked by how closely they match Postman, with what each charges once you outgrow the free plan.
Closest free matches
Ranked by shared use cases, audience and stack with Postman. Every tool here lists a free plan.
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Other free API & Backend tools
Popular free tools in the same category. Less closely matched to Postman, but worth a look.
| Tool | Free plan | Paid from |
|---|---|---|
| Supabase Open source Firebase alternative with Postgres, Auth, Storage, and Realtime. | Free · Pro · Enterprise | — |
| Composio Composio connects AI assistants and custom agents to more than 1,500 apps through managed authentication, SDKs and an MCP gateway, and its new Instant tools let agents pay per call for search, scraping, audio and data services from one balance. | Hobby - $0 - 100K tool calls/month, 50K trigger events/month, 3 team members · Pro - $29/month - includes $29 usage credit, unlimited team members, spend controls; overage $0.0003 per tool call · Enterprise - Custom - SSO/SCIM, customer-managed keys, custom SLAs, VPC or self-hosted deployment | — |
| ReefAPI ReefAPI is one gateway to 250+ live web-data APIs: e-commerce, social, real estate, jobs, travel, news, finance and company data. Clean JSON, free tier. | Free tier with 1,000 credits, no card · Paid monthly/quarterly/yearly | — |
| Screenshot Render Screenshot Render captures full-page and viewport screenshots of any URL via a simple API. Built for developers and SaaS teams who need reliable, high-quality website screenshots at scale. | Free | — |
| Orisift Orisift checks phone numbers, email domains, IP addresses and domains through one POST /v1/lookup endpoint and returns a verdict with its evidence. | Freemium | — |
Free alternatives to Postman: FAQ
Quick answers to common questions
Is Postman free?
Yes, Postman offers a free tier. The tools below are alternatives that are also free to start.
What is the best free alternative to Postman?
onsubmit.dev is the closest free match by shared use cases, audience and stack.
How were these free alternatives to Postman chosen?
Tools are ranked by similarity to Postman (shared use cases, target audience, tech stack and pricing model) and filtered to those whose listing shows a free tier, freemium plan or open-source edition. Where fewer than 2 close matches exist, popular free API & Backend tools fill the list and are labelled as such.
Building a free API & Backend tool?
List it free. Tools with a free tier appear on pages like this one.