Vellum
Hosted platform with a visual builder and SDK to create, evaluate, and deploy agentic AI workflows.
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Vellum scores 4.4/10 for free value in Agents. The main constraint: Free Base plan (small processing power, 4 GiB storage, no platform fee); Pro from ~$50/mo.
Free value score
4.4 / 10Show the math
Key metrics
What you get
Free Base plan (small processing power, 4 GiB storage, no platform fee); Pro from ~$50/mo
Eval-driven agent workflow ops
Gotchas
- Small processing power on free Base
The free Base plan includes small processing power and 4 GiB storage with no platform fee; more requires a paid plan.
Sources
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"Start free with Small processing power and 4 GiB storage, or upgrade for more."
https://www.vellum.ai/pricing -
"Pro $50 per month / Platform fee $10/mo / Processing power (Medium) +$35/mo / Storage (10 GiB) +$5/mo / Credits billed separately as used."
https://www.vellum.ai/pricing -
"Vellum assistant is open source. Deploy it on your own hardware, a VPS, or a private cloud... No platform fee, no machine tier charges."
https://www.vellum.ai/pricing -
"Vellum, the leading enterprise development platform for building, testing and deploying mission-critical AI products, today announced it has raised $20 million in Series A funding. The round was led by Leaders Fund... and returning investors Y Combinator, Rebel Fund, Pioneer Fund and Eastlink Capital."
https://siliconangle.com/2025/07/11/enterprise-ai-development-platform-vellum-raises-20m-help-businesses-deploy-apps-faster/