How much does Stack AI cost in 2026?
Quick Answer: Stack AI pricing 2026: Free tier with 1,000 runs/month, Builder $99/month per workspace, Team $499/month per workspace, Enterprise custom. Compute and LLM token costs are typically passed through.
Stack AI pricing is per-workspace at the published tiers, with usage-based metering for compute and LLM tokens. Pricing is consistent globally as of 2026.
Plans and pricing (verified 2026-05-05)
| Plan | Price | Workflow runs/mo | Workspaces | SSO | Audit log |
|---|---|---|---|---|---|
| Free | $0 | 1,000 | 1 | No | No |
| Builder | $99/month | 10,000 | 1 | No | Basic |
| Team | $499/month | 50,000 | 5 | Yes | Full |
| Enterprise | Custom | Custom | Unlimited | Yes | Full |
Annual billing saves approximately 20%.
What each tier adds
- Free: Single workspace, 1,000 workflow runs/month, basic LLMs, public documentation knowledge bases.
- Builder: Single workspace, 10,000 runs/month, all LLM providers, private knowledge bases, web chat and Slack deployment, basic audit log.
- Team: Five workspaces, 50,000 runs/month, SAML SSO, full audit log, priority support, EU data residency.
- Enterprise: Custom run limits, custom data residency, private model deployment (Anthropic Claude on Bedrock, OpenAI on Azure), dedicated success manager, contractual SLAs, custom integrations.
LLM token costs
Stack AI passes through LLM token costs at provider rates (no markup). A typical agent that calls Claude Sonnet 4.6 for retrieval-augmented Q&A costs approximately $0.005-$0.05 per turn depending on context size. Customers can also bring their own API keys (BYOK) to bill providers directly.
Free tier limits
The free tier supports a single workspace, 1,000 workflow runs/month, and a limited set of LLMs (GPT-4o-mini, Claude Haiku 4.5). It is sufficient for individual exploration but not for production workflows.
Free trial
A 14-day free trial of Builder is available with no credit card required.
Volume discounts
Team plan customers above 5 workspaces transition to Enterprise pricing. Enterprise contracts are typically negotiated at 6-figure annual values for organisations with 100+ active builders. Multi-year agreements typically receive 15-25% discounts.
Comparison to alternatives
For a mid-market team building 4-6 production AI agents:
- Stack AI Team: $499/month + ~$200-$800 in token pass-through
- Lindy Team: $59/user/mo (5 users) = $295/month + bundled LLM credits
- Relay.app Pro: $25/user/mo (5 users) = $125/month
- Relevance AI Pro: $599/month + tokens
- Dust Pro: $29/user/mo (5 users) = $145/month
- Building on raw Claude API: ~$300-$1,000/month tokens + engineering time
Stack AI Team and Relevance AI Pro are positioned for similar enterprise use cases at similar price points. Lindy, Relay, and Dust are typically less expensive but with weaker compliance and deployment-target stories.