Cachix
Cachix hosts Nix binary caches to share binaries across continuous integration, development, and deployment environments.
What Cachix is
Cachix hosts Nix binary caches to share binaries across continuous integration, development, and deployment environments. Its CLI can push binaries, watch a Nix store, and configure Nix to use a cache. Documentation includes CI guides for GitHub Actions, Buildkite, CircleCI, GitLab CI, Hercules CI, Hydra, and Travis CI. Cachix Deploy uses a pull model to deploy continuously to Nix profiles such as NixOS, nix-darwin, and Home Manager. Teams can assign read or write access to members and revoke access tokens; private cache reads and writes require a token, and cache entries are signed with a managed or self-signed key. When storage reaches its limit, least-recently-used entries are removed, and a warning email is sent at 85% of the limit. Enterprise options include on-premise or self-hosted deployment, SSO, SLA, dedicated premium support, custom deployment, and audit logs. The service offers a free plan and a 14-day trial. Listed plans include 50, 250, or 1,500 GiB of storage, with pricing available by contacting Cachix.
Good
- CLI can push binaries and configure Nix caches.
- CI guides cover seven named systems.
- Private cache access requires an access token.
- Enterprise options include self-hosting and SSO.
Watch out
- Plan prices require contacting Cachix.
- Storage limits vary by plan.
- Entries are removed by least-recently-used order at capacity.
Who it suits
Cachix suits teams using Nix that need to share binaries between CI, development, and deployment. Teams needing self-hosting, SSO, or audit logs can consider the listed enterprise options.
Verdict
Cachix combines Nix binary caching with deployment tooling, access controls, and CI guidance. Check the storage allowance and contact Cachix for plan pricing before selecting a plan.
Plans and prices
From Cachix's own pricing page, checked 4 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Pro | — | 1500 GiB of storage · Unlimited bandwidth · CloudFlare CDN caching · 1-hour Nix consultation · Cachix Deploy (1000 agents) · Please contact [email protected] for pricing |
| Standard | — | 250 GiB of storage · Unlimited bandwidth · CloudFlare CDN caching · 1-hour Nix consultation · Cachix Deploy (200 agents) · Please contact [email protected] for pricing |
| Starter | — | 50 GiB of storage · Unlimited bandwidth · CloudFlare CDN caching · Cachix Deploy (100 agents) · Please contact [email protected] for pricing |
The facts
Each one read from Cachix's own pages, with the date it was checked.
What it does
- Access controls
- Team members can be granted read and/or write access to a cache, and access tokens can be revoked at any time.checked 4 Oct 2026
- Cache performance
- The service says its optimizations speed up binary cache roundtrips and Cloudflare CDN enables performance and unlimited bandwidth on all plans.checked 4 Oct 2026
- Cache security
- Private cache reads and writes require an access token, and binary cache entries are signed using a managed or self-signed key.checked 4 Oct 2026
- CI integrations
- The documentation provides CI guides for GitHub Actions, Buildkite, CircleCI, GitLab CI, Hercules CI, Hydra, and Travis CI.checked 4 Oct 2026
- CLI
- The Cachix CLI can push binaries, watch a Nix store, and configure Nix to use a cache.checked 4 Oct 2026
- Deployment
- Cachix Deploy continuously deploys to Nix profiles such as NixOS, nix-darwin, and Home Manager using a pull model.checked 4 Oct 2026
- Enterprise
- Enterprise options include on-premise or self-hosted deployment, SSO, SLA and dedicated premium support, custom deployment, and audit logs.checked 4 Oct 2026
- Product
- Cachix is a service for hosting Nix binary caches.checked 4 Oct 2026
- Purpose
- Cachix shares binaries between CI, development, and deployment environments.checked 4 Oct 2026
- Security reporting
- Cachix says it acknowledges vulnerability reports within 5 business days, aims to resolve confirmed issues within 90 days, and does not offer a paid bug bounty.checked 4 Oct 2026
- Storage management
- When a cache reaches its storage limit, least recently used entries are removed; the pricing page says a warning email is sent at 85% of the limit.checked 4 Oct 2026
- Support
- Cachix lists live chat, email, GitHub issues, and a service status page as support or feedback channels.checked 4 Oct 2026
The company
- Company
- Cachix was launched in 2018 by Enlambda OÜ to accelerate Nix adoption through infrastructure and education.checked 4 Oct 2026
- Founded
- 2018checked 28 Sep 2026
- Headquarters
- Kuusalu vald, Estoniachecked 28 Sep 2026
