head to head · open source
Mattermost vs HashiCorp Vault
Mattermost has 39,510 GitHub stars, 9,087 forks, 1,012 open issues and last shipped yesterday. HashiCorp Vault has 36,462 stars, 4,801 forks, 1,435 open issues and last shipped yesterday. Mattermost leads on adoption by 8% (39,510 vs 36,462 stars). Mattermost is written in TypeScript under a custom or non-standard licence; HashiCorp Vault is written in Go under a custom or non-standard licence. Mattermost has attracted 23% as many forks as stars, HashiCorp Vault 13%. Mattermost was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Mattermost | HashiCorp Vault | |
|---|---|---|
| GitHub stars | ★ 40K | ★ 36K |
| License | Custom / other | Custom / other |
| Written in | TypeScript | Go |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 9.1K | ⑂ 4.8K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Mattermost if
- You weight community size — 40K stars and counting
- You want the Custom / other license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick HashiCorp Vault if
- You want the HashiCorp Vault feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches Go
- You evaluated both and HashiCorp Vault fits your workflow better
About Mattermost
Mattermost is an open core, self hosted collaboration platform that offers chat, workflow automation, voice calling, screen sharing, and AI integration. This repo is the primary source for core development on the Mattermost platform; it's written in Go and React, runs as a single Linux binary, and relies on PostgreSQL. A new compiled version is released under an MIT license every month on the 16th. Deploy Mattermost on premises, or try it for free in the cloud. Learn more about the following use cases with Mattermost: DevSecOps Incident Resolution IT Service Desk Other useful resources: Download and Install…
read the full Mattermost overview →
About HashiCorp Vault
Vault Please note : We take Vault's security and our users' trust very seriously. If you believe you have found a security issue in Vault, please responsibly disclose by contacting us at security@hashicorp.com. Website: developer.hashicorp.com/vault Announcement list: Google Groups Discussion forum: Discuss Documentation: Tutorials: Certification exam: Documentation source: Vault is a tool for securely accessing secrets. A secret is anything that you want to tightly control access to, such as API keys, passwords, certificates, and more. Vault provides a unified interface to any secret, while providing tight…
read the full HashiCorp Vault overview →
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Frequently asked questions
Is Mattermost or HashiCorp Vault more popular?
Mattermost has 39,510 GitHub stars and HashiCorp Vault has 36,462. Mattermost has the larger community by that measure.
Are Mattermost and HashiCorp Vault free?
Neither Mattermost nor HashiCorp Vault declares a licence in this registry, so check each project's own repository before relying on either for a commercial use. Both are free to self-host.
What is the difference between Mattermost and HashiCorp Vault?
Mattermost is written in TypeScript and HashiCorp Vault in Go. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Mattermost or HashiCorp Vault?
Choose Mattermost if you want the larger community (39,510 stars) or its Custom / other licence terms. Choose HashiCorp Vault if its feature set, stack or Custom / other licence fits better. Both are self-hostable.