Fossabot review

Fossabot is built for chats that move too fast for humans alone. Its 15 spam filters catch links, caps, symbols and repetition, timing out for 600 seconds by default or 30 seconds as a first warning. Blocked terms can match anywhere in a message or use regex, and a lookalikes list swaps characters such as 3 to e and 1 to i before checking, so disguised viewbot spam still gets caught. Commands carry global and per-user cooldowns, and timers skip their turn when chat has been quiet, which keeps small streams from looking spammy. Chat alerts cover Twitch follows, subs, bits, raids, hype trains, predictions and more, plus YouTube, Kick and X events. Moderators get roles, and the audit log shows who changed what. You can import commands, timers and filters from Nightbot, and alerts too from StreamElements. The gap is community features: Fossabot does not advertise loyalty points, a store or chat games.

Who it is for

Large or fast chats and mod teams that need strict, auditable moderation.

Price

Free.

Is Fossabot free? Yes. Fossabot is free to use.
Quoted from the vendor pricing page on November 9, 2026.

Key features

• 15 spam filters for links, caps, symbols, repetition and more
• Blocked terms with regex and a lookalikes list that reads 3 as e and 1 as i
• Custom commands with global and per-user cooldowns
• Timers that skip their turn when chat is quiet
• Moderator roles and an audit log of every change

Strengths and weaknesses

• Strength: Imports commands, timers, spam filters and blocked terms from Nightbot
• Strength: Supports four platforms, including Kick and X
• Strength: Free with nothing to download
• Weakness: No loyalty points or stream store is advertised
• Weakness: Fewer games and community features than StreamElements
• Weakness: No custom bot name option is documented

Key facts

• Price: Free
• Spam filters: 15
• Platforms: Twitch, YouTube, Kick and X
• Migration: Imports from Nightbot and StreamElements

Where it ranks

Fossabot is No. 2 in our Best Twitch Chat Bots verdict.