Last updated 08-30-2026
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cto.new (formerly Backengine)
cto.new lets you build apps, autonomous agent teams, and full AI businesses on frontier models from Anthropic, OpenAI, Gemini, Mistral, Grok, and DeepSeek without supplying a credit card or personal API keys. You spin up web and mobile apps, multi-agent teams, and full AI businesses from a single chat workspace inside hosted cloud sandboxes.
The product centers on agent teams that can browse the web, send email, schedule tasks, and connect to external tools through MCP servers. Integrations listed on the site include Linear, Sentry, Vercel, and Notion, with support for adding any MCP-compatible server. Web app projects ship with Convex as the default backend, giving new builds database, auth, file storage, and serverless functions without separate setup.
Where most AI coding tools sell subscriptions and cap model usage, cto.new keeps a free forever tier that is ad-supported with daily limits that reset each day. Its marketplace sells ready-made multi-agent businesses you deploy in one click, closer to hiring a prefab team than prompting a single chatbot.
The free tier covers frontier models, unlimited AI businesses, web and mobile apps, CTOClaw agents, and MCP integrations. Premium starts at $20 per month for higher usage, pro agent features, and premium model access.
Sign up free with no credit card or personal API keys required
Marketplace teams map roles to models like Claude Sonnet 4.6 and GPT-5
MCP integrations connect Linear, Sentry, Vercel, Notion, and custom MCP servers
Web app builds include Convex backend with database, auth, and file storage preconfigured
Run multi-agent teams with web browsing, email, and scheduling built in
Premium plan starts at $20 per month for higher usage and premium model access
Free forever tier covers apps, agent teams, and MCP integrations without requiring API keys.
Marketplace offers one-click deploy of multi-agent teams with named model assignments.
Web apps include Convex backend with database, auth, and file storage preconfigured.
Free tier is ad-supported and subject to daily usage limits that reset each day.
Premium pricing details beyond the $20 starting point are not fully listed on the public pricing page.
The backengine.dev domain redirects to cto.new, which may confuse users looking for the old Backengine product.
Is cto.new free to use?
Yes. cto.new offers a free forever tier that includes frontier AI models, unlimited AI businesses, web and mobile apps, CTOClaw agents, and API and MCP integrations. The free plan is ad-supported and daily limits reset each day. Premium upgrades start at $20 per month.
What AI models does cto.new support?
cto.new runs frontier models from providers including Anthropic, OpenAI, Gemini, Mistral, Grok, and DeepSeek. Marketplace teams assign specific models such as Claude Sonnet 4.6 and GPT-5 to lead and specialist roles. Premium unlocks premium model access along with higher usage limits.
What is the cto.new AI Business marketplace?
The marketplace on cto.new lets you buy ready-to-run AI businesses with pre-configured agent teams, or list your own team for sale. Categories include engineering, marketing, content, sales, design, research, and support, with team leads and specialist agents already defined.
Does cto.new support MCP integrations?
Yes. cto.new supports MCP and skills-based integrations with services such as Linear, Sentry, Vercel, and Notion. The platform also supports connecting custom MCP servers to extend what your agent teams can do.
Do I need my own API keys on cto.new?
No. cto.new is designed so you can build without supplying your own API keys. You sign up on the site and the platform provides model access through its hosted environment.
What can I build with cto.new?
cto.new supports building web apps, mobile apps, autonomous agent teams, and full AI businesses. Documented use cases include AI customer support agents, marketing agents, and AI receptionists coordinated by a team lead with specialist members.