Stay free if you only need 500 runs/month and 2 projects. Upgrade if you need custom number of runs and unlimited projects. Most solo builders can start free.
Why it matters: Significant pricing gap - jumps from free tier directly to custom enterprise pricing with no middle option
Available from: Enterprise
Why it matters: Custom enterprise pricing lacks transparency, potentially expensive for smaller organizations
Available from: Enterprise
Why it matters: Limited to internal processes, not suitable for customer-facing applications
Available from: Enterprise
Why it matters: May be overkill for simple automation tasks that don't require enterprise features
Available from: Enterprise
Why it matters: Free tier limited to 500 runs per month and basic support via Discord only
Available from: Enterprise
Why it matters: Learning curve for complex workflow design despite intuitive interface
Available from: Enterprise
The free plan covers basic agent needs. For professional use with advanced features and higher limits, consider upgrading to a paid plan.
Check the comparison above for the most affordable paid tier that includes premium features beyond the free plan limitations.
Many tools offer free trials of paid tiers. Visit Stack AI's website to check current trial offerings and duration.
Most tools allow downgrades, but you may lose access to paid features and data. Check Stack AI's policy before upgrading.
Start with the free plan — upgrade when you need more.
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Last verified March 2026