Free · by application · 3 per weekDescribe your problem.
Get a working prototype in 24 hours.
Tell us what eats your team's time. We build a working first version of the automation or AI agent, on your workflow, and send you a demo page with a screen recording. Free, by application, 3 per week.
3 of 3 spots left this weekResets Monday, 12:00 AM IST
Apply for a free prototype →Monthly build plans
🛡Pay-later guarantee. If the prototype doesn't show it can save you 10+ hours a week, you pay nothing for the build.
How it works
1Apply in 60 secondsYour website, your email and the problem in a sentence or two. Pick your tools and budget with a tap.
2Instant decisionA fixed checklist scores every application the same way. The top 3 each week are accepted right away, by email.
3Prototype in 24 hoursReply with one real example. Within 24 hours you get a working version and a private demo page with a recording.
4Decide with proofIf it saves 10+ hours a week, we build it for production or run it monthly. If not, you pay nothing.
n8n / Make workflowsAI chat agentsAI voice agentsRAG over your documentsMCP / Claude appsInternal tools
Apply for a free prototype
Cofounderbase BuildPrefer it done for you every month?
Cofounderbase Build is our own done-for-you team. We build, run and improve your automations and AI agents for a flat monthly fee, instead of a one-off project.
Best place to startStarter
$3k/month
One team, one or two workflows that eat time every week.
- 1 live automation or AI agent at a time (n8n/Make workflow, chat agent or internal tool)
- Up to 2 new builds or major changes a month
- Monitoring and fixes when something breaks
- Monthly 30-minute review call and a written report of hours saved
Apply for StarterGrowth
$5k/month
Companies automating across sales, support and operations.
- Up to 3 automations or AI agents running and improved in parallel
- Up to 4 new builds or major changes a month, including RAG over your documents
- Weekly check-in, a shared roadmap and a 1-business-day response
- Hours-saved dashboard you can show your boss
Apply for GrowthScale
from $7k/month · talk to us
Teams that want an AI build team without hiring one.
- Unlimited requests, worked on one or two at a time in priority order
- Voice agents, MCP/Claude apps, custom internal tools and integrations
- Same-day response on weekdays, weekly call, quarterly automation audit
- Documentation and handover, so you own everything we build
Talk to us Prototype to production sprint, from $1,500. Want it shipped once instead of a monthly plan? We take the free prototype to a live, documented production version as a fixed-price sprint. Apply for a sprint
Month to month, cancel with 30 days' notice. Every plan starts with the free prototype, so you see working software before you pay anything. No checkout: apply and we reply by email.
Questions
Is it really free?
Yes. The prototype is free and you are under no obligation. If you want it built into a production system, we quote the build or one of the monthly Cofounderbase Build plans.
What does "pay nothing" mean?
If the prototype does not show it can save you 10 or more hours a week, you pay nothing for the build. We agree the measure with you before we start, for example emails handled, rows entered or calls answered per week.
Why only 3 a week?
Each prototype is built by hand by a small team, so we cap it at 3 a week to keep the 24-hour promise. The counter resets every Monday (India time). If the week is full you join the waitlist and get matched agencies right away.
What can you build in 24 hours?
A working first version of one workflow: an n8n or Make automation, a chat or voice agent, a question-answering assistant over your documents (RAG), an MCP/Claude app or a simple internal tool. It runs on demo data or a test account, with a short screen recording.
How do you choose?
A fixed checklist, scored the same way for everyone: budget range, a work email, a real company website, how clearly the problem is described and whether it fits what we build. The top applications each week are accepted automatically.
Do you need my passwords?
No. We build on sample data or test accounts. If we need access, we send a secure way to share it, never plain email.