Agent tools / Agent builder

Voiceflow

Platform for building, testing and running chat and voice AI agents for customer experience teams.

Supervision needed
Medium You design the flows and guardrails; test before launch and review transcripts.
Where it tends to fail
Agents that go off-script when instructions and knowledge sources are thin.
Pricing
Prices not published; free trial for agencies, request pricing for businesses. Pricing page (Checked Oct 2026)
Website
https://www.voiceflow.com

The supervision level and failure notes are our editorial judgment from how these tools are built and used, not test results or ratings. Your setup may differ.

Other agent builder tools

  • Lindy

    Builds AI assistants that handle email, meetings, and scheduling tasks.

    Agent builder Medium supervision Free plan available Freemium Text/chat Free trial

    Updated Oct 14, 2026

  • Relevance AI

    Platform for building teams of AI agents for sales and operations work.

    Agent builder High supervision No public price Pricing model unknown Text/chat

    Updated Oct 14, 2026

  • Gumloop

    No-code builder for AI workflows and agents, strong on research and scraping.

    Agent builder Medium supervision From $37/mo Subscription Text/chat Free trial

    Updated Oct 14, 2026

  • Botpress

    Platform for building AI chat agents and deploying them on websites and messaging apps.

    Free plan; Plus is $150/mo and Team $750/mo, billed annually. Source, checked Oct 14, 2026

    Agent builder Medium supervision Free plan available Freemium Text/chat

    Updated Oct 14, 2026