toolgrep / Email & messaging / Slack
Alternatives to Slack
Slack: AI work platform and productivity tools. 8 products similar to Slack, compared on pricing, free tier, API, MCP server, SDK and open source. 8 of 8 have a free tier, 8 of 8 have an API, 3 of 8 offer an MCP server, 1 of 8 is open source.
- Flock
Team messenger and online collaboration platform
- Hex
The Analytics platform for humans and agents
- Slab
Knowledge base & wiki software for teams
- Chanty
Team communication and collaboration software with chat, tasks, Kanban, audio & video calls, and AI agent support
- Nuclino
Your team’s collective brain
- Lockit
Reserve and manage shared resources within Slack
- Calendly
Meeting scheduling software with AI scheduling, notetaking, and payment tools
- Rocket.Chat
Secure communication platform for messaging, voice, video, apps, and AI, deployable on-premises, in sovereign cloud, or air-gapped.
Side by side
| Product | Pricing | Free tier | API | MCP server | SDK | Open source |
|---|---|---|---|---|---|---|
| Slack | Freemium | yes | yes | yes | yes | no |
| Flock | Freemium | yes | yes | no | no | no |
| Hex | Freemium · from $36 per Editor / month | yes | yes | yes | no | no |
| Slab | Freemium | yes | yes | no | no | no |
| Chanty | Freemium · from $3 per user/month (Business, billed annually); free plan available | yes | yes | yes | — | no |
| Nuclino | Freemium | yes | yes | no | no | no |
| Lockit | Freemium | yes | yes | no | no | no |
| Calendly | Freemium · from $10 | yes | yes | yes | — | no |
| Rocket.Chat | Freemium | yes | yes | no | yes | yes |
Facts come from each product's own website, or from its verified owner when they have edited the listing. Each product page shows when it was last verified and how it was extracted. Similarity comes from the products' descriptions.
API
curl https://toolgrep.com/api/products/slack/alternatives