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Alternatives to Postman

2 editor-selected alternatives · Postman overview →

source: tools.alternatives · stored order · active records only; review scores are annotations and never change membership or order

A directional evidence panel appears only when the substitute rationale, trade-offs, sources, and verification date have been recorded. Older selections without that panel remain visible but are unclassified under the new evidence contract.

Firecamp logo
1

Firecamp

open sourcefreemiumexplicit relation

Firecamp is an open-source API DevTool supporting REST, GraphQL, WebSocket, and Socket.IO protocols as a lightweight alternative to Postman. It provides IntelliSense, team collaboration with shared workspaces, and seamless import from OpenAPI, Insomnia, AsyncAPI, and HAR formats. Each protocol gets a dedicated testing playground with response metrics including time, size, and status codes.

Firecamp is an open-source API development platform offering a Free tier with up to 5 seats and multi-protocol API testing (REST, GraphQL, WebSocket). The Team plan is $59/month ($49/month billed annually) for up to 15 seats with collaborative workspaces, alongside custom Enterprise pricing and a free self-hosted open-source edition.
Knock logo
2

Knock

freemiumexplicit relation

Knock is flexible notification and customer engagement infrastructure built for developers and AI agents. Send messages across email, SMS, push, chat, and in-app channels from a single API. Features AI-native journey building with single-prompt workflows, advanced segmentation with dynamic attributes, in-app messaging with custom components, data unification across warehouse and CDP, and version control with rollbacks. Delivers hundreds of millions of messages monthly with 99.99% uptime.

Knock offers notification infrastructure with a Free tier (10,000 messages/mo), a Starter tier at $250/mo (includes 50,000 messages + $0.005/msg overage), and custom Enterprise plans for high-volume compliance needs.

Open-source Postman alternatives

Firecamp — see all open-source developer tools.

Free Postman alternatives

Firecamp, Knock offer a free plan or free tier.

More Productivity & Workflow tools

same category, not editor-selected alternatives — see how Postman compares →

Grok BotGrok Bot is SpaceXAI's beta workspace for persistent AI teammates that use apps, websites, files, terminals, plugins, and MCP on a user-scoped cloud computer. Bots can learn routines, coordinate in parallel, and, when enabled by team policy, launch Cursor Cloud Agents that work on code in isolated environments and return pull requests and verification artifacts.MCP InspectorMCP Inspector is the official interactive developer tool from the Model Context Protocol team for testing, debugging, and validating MCP servers. It provides a visual interface to inspect available tools, test transport configurations, export configs for different clients, and verify protocol compliance during MCP server development.PlaywrightCross-browser E2E testing framework by Microsoft supporting Chromium, Firefox, and WebKit with one API. Features auto-waiting, tracing with timeline/screenshots/DOM snapshots, codegen for recording tests, and parallel execution. Component testing for React, Vue, Svelte. Built-in API testing, network mocking, and mobile emulation. Known for reliability and speed vs Selenium/Cypress. 70K+ GitHub stars, rapidly becoming the E2E standard.RaycastBlazingly fast, extensible productivity launcher for macOS that replaces Spotlight and serves as a keyboard-driven command center. Includes instant app launching, clipboard history, snippet management, window management, calculator, and a built-in AI chat with multiple models. Extension store with 1,000+ community integrations (GitHub, Jira, Linear, Docker). Script commands for shell automation, plus a React/TypeScript API for custom extensions.LinearFast, opinionated project management for software teams with a keyboard-first interface, cycles, roadmaps, and deep GitHub/GitLab integration. Used by Vercel, Anthropic, and Coinbase. The modern Jira alternative that engineering teams actually enjoy using, with a clean design and responsive UI that makes issue tracking feel effortless rather than burdensome.DeepEvalDeepEval is an Apache-2.0 Python framework for evaluating LLM apps, RAG systems, agents, MCP workflows, and safety behavior with repeatable test cases. It works locally and in CI/CD, then connects to Confident AI for hosted reports, observability, red teaming, and governance when teams need shared evidence instead of ad-hoc prompt reviews and manual QA.ObsidianKnowledge management app based on local Markdown files with powerful linking and graph visualization. Bidirectional links, graph view, canvas for spatial thinking, templates, daily notes, and 5,000+ community plugins. All data is stored as plain .md files with no vendor lock-in. Custom themes, Vim mode, and Dataview support database-like queries. Sync and Publish are paid add-ons; the core app remains free for personal use.ZapierThe most popular no-code automation platform connecting 9,000+ apps and app connections to automate workflows without writing code. Features multi-step Zaps with conditional logic, AI Copilot for natural language workflow creation, Tables, Forms, and MCP integration for AI orchestration. Task-based pricing with a free tier at 100 tasks/month. Used by businesses from solo operators to enterprise teams for eliminating repetitive work across their software stack.reviewdogreviewdog is an open-source automated code review tool that integrates any linter or static analysis tool with GitHub, GitLab, Bitbucket, and Gitea pull requests. Parses output in errorformat, Checkstyle XML, SARIF, and JSON formats to post inline review comments on changed lines only. Works with GitHub Actions, Travis CI, CircleCI, GitLab CI, and Jenkins. Supports 40+ languages through universal linter adapter architecture.

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FAQ

Which Postman alternative is listed first?

Firecamp is first in the editor-selected list of 2 Postman alternatives. The stored order is editorial; review scores do not determine membership or position.

Are there open-source Postman alternatives?

Yes — Firecamp are open source.

Are there free Postman alternatives?

Yes — Firecamp, Knock offer a free plan or free tier.