Flock vs Mattermost: Complete Comparison (2026)
Choosing between Flock and Mattermost is a common decision for team communication buyers in 2026. Both Flock and Mattermost are established players, founded in 2014 and 2015 respectively. Flock serves 500K+ users while Mattermost has 800K+ users globally. Flock differentiates with channels and video calls, while Mattermost leads with self-hosted deployment and channels. In this head-to-head comparison, Flock earns a higher hiltonsoftware.co score of 86/100 — but the right choice depends on your specific needs, budget, and team size.
Quick Comparison
Feature-by-Feature Comparison
Pros & Cons at a Glance
After comparing Flock and Mattermost across features, pricing, and user satisfaction, Flock takes the lead with a score of 86/100 versus Mattermost's 86/100. Flock's key advantages include "built-in productivity apps" and "cost-effective for small teams". That said, Mattermost has its own strengths — particularly "full data control" — making it a viable alternative for specific use cases.
Both Flock and Mattermost offer free plans, lowering the barrier to entry. Flock's paid plans start at $4.50/user/mo while Mattermost begins at $10/user/mo (cloud). Evaluate which paid features — Polls, Reminders (Flock) vs DevOps integrations, Compliance tools (Mattermost) — justify upgrading for your team.
Bottom line: Choose Flock if you need smbs wanting affordable slack alternative with productivity tools. Go with Mattermost if your priority is enterprises needing data sovereignty and self-hosting. Both are strong team communication tools — we recommend trying the free plan of each before committing.
SMBs wanting affordable Slack alternative with productivity tools.
Enterprises needing data sovereignty and self-hosting.