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Insomnia vs Tiltmeter
Insomnia is an API client for manual exploration; Tiltmeter continuously monitors drift without user interaction.
InsomniaOpen-source API client for REST, GraphQL and gRPC
TiltmeterKnow when the APIs under your agents move.Which to pick
Pick Insomnia if you want…
- Collaborative AI-native API testing
- Interactive API debugging
- Integrations with Kong Konnect, OIDC or SAML (on Insomnia's list, not Tiltmeter's)
Pick Tiltmeter if you want…
- Detecting undocumented API drift
- A free, open-source tool
- Integrations with Python 3.12+ or Slack (on Tiltmeter's list, not Insomnia's)
Side by side
- What it is
- Insomnia:Insomnia is an open-source API client for designing, testing, debugging and mocking REST, GraphQL, gRPC, SOAP and WebSocket APIs.
- Tiltmeter:Tiltmeter monitors third-party JSON APIs, detects breaking changes, alerts CI/agents, and auto-generates fix pull requests.
- Best for
- Insomnia:Collaborative AI-native API testing
- Tiltmeter:Detecting undocumented API drift
- Who it’s for
- Insomnia:API developers, security-focused teams, and organizations needing collaborative API workflows.
- Tiltmeter:Developers and teams using external APIs without reliable changelogs, especially those building AI agents.
- Pricing
- Insomnia:Freemium
- Tiltmeter:Open source
- Open source
- Insomnia:Yes, 40,038 GitHub stars
- Tiltmeter:Yes, 0 GitHub stars
- Works with
- Insomnia:Kong Konnect, OIDC, SAML, SCIM, Inso CLI
- Tiltmeter:Python 3.12+, Slack
Insomnia features
- Design-first API editor. Create and preview OpenAPI specs in real time with live linting.
- Native API mocking. Generate dynamic mock responses from collections, specs or plain language.
- Automated testing at scale. Run unlimited collection tests with pre/post scripts and CI/CD integration via Inso CLI.
- Kong Konnect integration. Sync API catalog directly with Kong Konnect for up-to-date endpoint discovery.
- Collaboration & RBAC. Real-time project sharing, role-based access controls and unlimited collaborators per project.
- Flexible storage options. Store data locally, in Git, in the cloud, or hybrid with end-to-end encryption.
- Enterprise identity & security. SSO via OIDC/SAML, SCIM provisioning, SOC 2 compliance and enterprise SLAs.
- MCP client support. Test and debug MCP servers with AI-powered workflows.
Tiltmeter features
- Shape learning. Observes real API responses to build a statistical JSON schema of fields and types.
- Drift detection. Compares new responses to the baseline and flags breaking, warning, or info changes.
- CI/Slack alerts. Fails CI jobs and sends alerts via Slack or webhooks with a concise change summary.
- Auto-fix PRs. Opens a pull request with code updates after an agent adapts to the new schema.
- MCP integration. Provides has_drifted, get_schema, and other calls for LLM agents to query before trusting data.
- GitHub Action. Runs Tiltmeter in CI, caches baselines, and exits with codes indicating drift severity.
Insomnia vs Tiltmeter FAQ
Is Insomnia or Tiltmeter free?+
Insomnia has a free plan and paid plans. Tiltmeter is free and open source.
Is Insomnia or Tiltmeter open source?+
Yes, both are open source: Insomnia (Kong/insomnia on GitHub, Apache-2.0 license) and Tiltmeter (tiltmeter-dev/tiltmeter on GitHub, MIT license).
Do Insomnia and Tiltmeter integrate with the same tools?+
Their integration lists don't overlap: Insomnia lists Kong Konnect, OIDC, SAML, SCIM and 1 more; Tiltmeter lists Python 3.12+ and Slack.
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.