Stack AI vs Vellum
A side-by-side comparison of capabilities, autonomy, integrations, and pricing to help you choose.
Short answer: choose Stack AI if you want enterprise no-code platform for building governed ai agents (Supervised agent, enterprise); choose Vellum if you want platform to build, evaluate, and deploy llm apps and ai agents (Supervised agent, contact).
| Stack AI | Vellum | |
|---|---|---|
| What it is | Enterprise no-code platform for building governed AI agents | Platform to build, evaluate, and deploy LLM apps and AI agents |
| Type | platform | platform |
| Autonomy | Supervised agent | Supervised agent |
| Pricing | enterprise · Free edition; Enterprise custom (per seat) | contact |
| Best for | enterprise, mid-market | developers, enterprise |
| Deployment | saas, self-hosted, on-prem | saas, api |
| Modalities | text, api | text, code, api |
| Models | model-agnostic | model-agnostic, gpt, claude, gemini |
| Protocols | function-calling, rest-api | mcp, function-calling, rest-api |
| Integrations | Salesforce, Slack, Google Workspace, Snowflake, SharePoint | Composio, OpenAI, Anthropic, Google Gemini, AWS Bedrock, Cursor |
| Capabilities | 3 documented | 4 documented |
Stack AI
- +Strong enterprise governance: RBAC, audit logging, SSO, on-prem options
- +Compliance coverage (SOC 2 Type II, HIPAA, GDPR) and 100+ integrations
- +No-code builder makes internal agents accessible to non-developers
- -Acquired by Asana (reported May 2026), creating roadmap uncertainty for standalone buyers
- -Enterprise pricing is custom and per-seat, not transparent
Vellum
- +Genuinely model-agnostic with a large, frequently updated catalog, avoiding lock-in
- +Covers the full LLM lifecycle (experiment, evaluate, deploy, monitor) in one place
- +Strong agent tooling with first-class MCP, Composio integrations, and auto-generated function-calling schemas
- -Brand and domain confusion: the apex vellum.ai domain appeared to host an unrelated product at this review
- -Platform pricing is not transparently published (sales-led, enterprise-leaning)
Which should you choose?
Stack AI is enterprise no-code platform for building governed ai agents, best for enterprise, mid-market. Vellum is platform to build, evaluate, and deploy llm apps and ai agents, best for developers, enterprise. The right choice depends on the autonomy level you want, your existing integrations, and your budget, all compared above.