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Curious Thing

Phone calls, handled by AI

AI Sales Ops
For AI agents
APILimited readiness
About

What is Curious Thing

Curious Thing runs voice AI agents that take and make phone calls on behalf of a business — answering common questions, capturing lead details, scheduling appointments, and routing callers to human agents when needed. It's built for founders and RevOps teams at SMBs and mid-market companies who need phone coverage at volume without adding headcount. The standout capability is bilingual support across multiple languages, which lets a single AI agent serve diverse customer bases without separate workflows. Webhook integration and a public API allow connections to external tools, though the integration surface is narrow — ChatGPT and webhooks are the primary bridges, so teams expecting deep CRM-native sync will need to build that themselves. If your operation depends on complex, multi-system call routing or detailed post-call analytics, you'll likely outgrow the platform's current reporting depth.

AI Sales Ops
Capabilities

Key features

Customer service AI

automated support and inbound triage

AI capabilities

autonomous multi-step actions, call transcription + summary

Outbound webhooks

event-driven integrations

Our verdict

Vanderbuild take

For founders and RevOps teams who need phone-based customer service coverage without hiring, Curious Thing is a practical starting point — it handles the call queue, qualifies leads, and books appointments without a human on the line. On the agentic readiness front, the API is available but the overall readiness is limited — you can wire up webhooks and push data out, but don't expect to orchestrate this cleanly inside a broader AI agent stack or MCP layer without hitting friction. Pricing starts at $24/month, which is affordable for small teams, though you'll likely move to the $99 Business tier once you need smart call transfer or multiple AI receptionist skills. The honest constraint here is integration depth: outside of webhooks and ChatGPT, there's no native CRM sync, so any HubSpot or Salesforce pipeline updates will require custom plumbing on your end.

Mateusz Sekta
Founder, vanderbuild
Learn more

Our Resources

The wedge

Agentic stack profile

API
Webhook only

Programmatic access available.

Webhook-based — receive events but you cannot pull data on demand.

Agentic readiness
Limited

Usable but with caveats — rate limits, brittle endpoints.

API exists but is rate-limited, brittle, undocumented, or hidden behind enterprise plans. Use with caution in production agent workflows.

Stack role
AI agent

Where this tool slots into an agentic pipeline.

Plays the role of AI agent in an agentic pipeline. Use it to act autonomously on inbox, scheduling, or research work.

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Answers

Frequently asked questions

Does Curious Thing have a public API?

Yes — Curious Thing ships a Webhook only API. Note the API is rate-limited or enterprise-gated, so plan integrations accordingly.

How much does Curious Thing cost?

Curious Thing: pricing is workspace-based, expect mid tier ($$) spend. Full pricing page: https://curiousthing.io/pricing/lucy-ai-phone-answering.

Who is Curious Thing best for?

Curious Thing is built for Founder, RevOps. Fits SMB (1-50), Mid-market (50-500)-sized teams.

How well does Curious Thing fit an agentic sales stack?

Tier: Limited. An API exists but it's rate-limited, brittle, or enterprise-gated. Plan integrations carefully.