Chatsy (chatsy.app) is an agentic AI customer-support SaaS by ZTABS: AI agents call APIs and take actions, plus live chat, knowledge base, ticketing, and mailbox. 15+ AI models, 15-min setup, OAuth2, AES-256/GDPR. Free starter.
Chatsy is deploy intelligent agents that call APIs and solve problems. Plus built-in knowledge base, ticketing & mailbox - the complete support platform.
SaaS / AI & Customer Support
Chatsy — AI agents that take action, backed by a full toolkit
Deploy intelligent agents that call APIs and solve problems. Plus built-in knowledge base, ticketing & mailbox - the complete support platform.
15+
AI Models
15 min
Setup Time
Free
Starter Plan
The Problem Chatsy Solves
Businesses need AI support agents that actually do things — not just answer questions. Chatsy deploys intelligent agents that take action, call APIs, and solve problems, with a full support platform behind them.
How Chatsy Works
Chatsy is an AI customer support platform built by ZTABS — not just a chatbot builder. Deploy intelligent agents that call APIs, process refunds, update orders, and actually solve customer problems, backed by a complete support toolkit: knowledge base, ticketing system, and shared mailbox. Setup takes under 15 minutes with no coding required.
Features include agentic AI with tool calling (your agents take real actions, not just answer questions), live chat with seamless human takeover, custom actions with OAuth2 integrations to your existing systems, real-time knowledge sync via website crawling and document upload, and enterprise-grade security with SOC 2 compliance. Supports 15+ AI models so you choose the intelligence behind your agents. Free starter plan available for small teams; scales to enterprise with custom plans.
Chatsy Key Benefits
Agentic AI & Tool Calling
AI agents that call APIs and execute actions — not just answer questions. Solve real problems automatically.
Complete Support Platform
Knowledge base, ticketing, mailbox, and live chat with human takeover — all in one platform.
15+ AI Models
Choose from 15+ AI models to power your agents. Real-time data sync from your website and docs.
Enterprise Security
AES-256 encryption, TLS 1.3, GDPR compliant. OAuth2 integrations for custom actions.
Chatsy Features
Agentic AI & Tool Calling
Live Chat & Human Takeover
Custom Actions & Integrations (OAuth2)
Knowledge Base CMS
Team Inbox & Ticketing
Real-time Data Sync (Website Crawl, Docs)
Enterprise Security (AES-256/TLS 1.3, GDPR)
Email Integration
Chatsy — Real-World Gotchas
Operational pitfalls we see in products shaped like this. Worth planning for up front.
Tool-calling hallucinations at model swap time
Switching the underlying LLM (GPT-4 → Claude → Gemini) breaks prompts silently — argument formats drift. Pin the model per deployment and only bump versions behind a staging test suite.
Knowledge-base drift after website re-launches
A site redesign that moves URLs silently empties the crawl index; the AI starts answering "I cannot find that." Re-run the crawler and diff page counts after every major content release.
Human-takeover handoffs lose context on cold agents
When a human joins mid-conversation, agents scroll past the system context and miss what the AI already tried. Surface the AI scratchpad in the takeover UI, not just the message history.
When Chatsy is not the right pick
We would rather help you rule this out now than waste a trial.
Teams that need a pure human-only helpdesk
If AI answers are off the table (regulated health/finance triage, legal advice), you should pay for Zendesk or Help Scout, not a platform whose value prop is agentic AI with tool calling.
Under 20 tickets a week total
At that volume, a shared inbox and a FAQ page beats any AI-support setup. Chatsy pays off when deflection matters — hundreds of tickets weekly where the AI can actually cut load.
Zero-integration requirements
The "agents take action" pitch depends on OAuth2 calls into your billing/order/CRM systems. If you cannot expose any backend API, you are paying for a glorified chatbot.
Chatsy Tech Stack
Chatsy is built with a modern, production-proven technology stack chosen for performance, scalability, and developer productivity.
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Learn moreChatsy vs. alternatives
Honest side-by-side on who each alternative actually fits, with real pricing and the biggest trade-off.
| Alternative | Best For | Pricing | Biggest Gotcha |
|---|---|---|---|
| Intercom Fin | Mid-market SaaS teams already on Intercom who want AI deflection bolted onto existing conversations | Fin runs $0.99 per resolution on top of Intercom seats ($39–$139/user/mo) | Per-resolution pricing gets expensive fast at scale (10k resolutions/mo = $9,900 in Fin alone). Tool-calling to external APIs is limited compared to an agentic-first platform. |
| Zendesk + Zendesk AI | Larger support orgs that need macros, SLA routing, and omnichannel before adding AI | Suite Team $55/agent/mo up to Suite Enterprise $169/agent/mo; AI add-on $50/agent/mo | AI deflection quality trails agentic tools; real action-taking (refunds, order updates) still requires custom Zendesk app dev. Pricing is per-agent, not per-resolution. |
| Crisp or Tidio with AI add-ons | SMB e-commerce and service sites wanting a chat widget with light AI | Crisp Pro $25/mo (4 seats); Tidio Growth $49/mo plus Lyro AI $39/mo | AI is answer-only — no real tool-calling into your billing/CRM. Fine for FAQ deflection, weak for anything requiring an API call to resolve. |
| DIY with LangChain/LangGraph + OpenAI + Postgres | Engineering teams that want full control over the agent stack and data residency | OpenAI tokens ~$0.01–$0.05 per conversation + Pinecone/pgvector hosting + ~200–400 eng hrs for v1 ($20k–$40k at $100/hr) | You own the evals, safety rails, tool schemas, and regression testing. Production-grade agent systems need a dedicated engineer — not a side project. |
When Chatsy pays for itself
Below ~80 tickets per week, a shared inbox and a good FAQ page beats any AI support setup — Chatsy is over-scoped. Between 500 and 2,000 tickets/month, a realistic 40–60% deflection rate through agentic tool-calls saves 2–3 full-time support hours per day ($3,600–$5,400/mo at a $30/hr loaded agent rate) — even the mid-tier Chatsy plan clears break-even inside the first week of the billing cycle. Versus Intercom Fin at $0.99/resolution, handling 5,000 monthly resolutions on a flat Chatsy plan saves $3,000–$4,000/mo in per-resolution fees alone. A DIY agent build only pays off past roughly 18 months of stable requirements, assuming you already have a full-time engineer to own the platform.
Chatsy — Frequently Asked Questions
What is Chatsy?
Deploy intelligent agents that call APIs and solve problems. Plus built-in knowledge base, ticketing & mailbox - the complete support platform.
What problem does Chatsy solve?
Businesses need AI support agents that actually do things — not just answer questions. Chatsy deploys intelligent agents that take action, call APIs, and solve problems, with a full support platform behind them.
What technologies power Chatsy?
Chatsy is built with Next.js, TypeScript, OpenAI, PostgreSQL, Redis.
Who built Chatsy?
Chatsy was built and is operated by ZTABS, a custom software development company. Learn more at https://ztabs.co/products/chatsy.
Can ZTABS build something similar for my business?
Yes — we bring the same engineering and product thinking to every client project. Contact us at ztabs.co/contact for a free consultation.
Want Us to Build Something Like Chatsy?
We bring the same engineering excellence and product thinking that went into Chatsy to every client project. Let's discuss your idea.