Business · 5 tools · updated Oct 15, 2026
Put an AI support agent on my site or in my helpdesk
Sierra leads with an evidence score of 18/100, ahead of Chatbase (16) and Tidio (11). 2 of 5 can be used free. Best for large brands automating support actions: Sierra.
Ranked by evidence — GitHub stars, Hacker News mentions, release activity and how much you can use for free. Recomputed nightly. How the score works.
+ Agents take real actions (returns, bookings, account changes) with strong guardrails, and you pay only for resolved cases.
− Enterprise sales process and pricing; not self-serve for small businesses.
+ Paste a URL and have a working embedded bot in minutes, with actions for lookups and lead capture.
− Message credits are tight on lower tiers, and answers drift when the source content is thin.
+ Combines live chat, email inbox and the Lyro AI agent in one affordable tool with Shopify and WordPress plugins.
− Lyro conversations are metered separately, so costs climb as the bot gets busier.
+ Pay-per-resolution pricing and consistently high measured resolution rates on real support queues.
− Per-resolution fees scale unpredictably, and it is most compelling if you already use Intercom.
+ Native to the ticketing system many support teams already run, with agent-assist as well as customer-facing bots.
− Add-on pricing on top of Zendesk seats makes the total cost high, and setup needs admin effort.
Head to head: Sierra vs Chatbase Sierra vs Tidio Chatbase vs Tidio
Missing a tool? It gets added when it shows up in the release feed with real traction, not by request.