Vellum

Coursemojo's customer-maintained subprocessor register lists Vellum as an Artificial Intelligence APIs provider in its student-data processing stack, with a June 2025 service-list update.

Vellum's June 2026 But Poorly Drawn case study describes Lucy reading support emails via API, drafting replies in Slack and consulting Notion policies, with the store owner approving final sends. The owner reportedly reviews support for a few minutes twice daily; future fulfillment and multi-agent expansion remain plans.

Vellum has built a production AI development platform with paying enterprise customers and raised a $20M Series A to expand production AI deployments, but public deployment scale remains modest relative to leading agent platforms.

Vellum documents asynchronous workflow execution returning an execution identifier, optional external identifiers for correlation, completion and rejection webhooks with HMAC verification guidance, and automatic queuing above concurrency limits.

Vellum combines orchestration, evaluation and production AI-development tooling and in 2026 expanded into persistent personal-intelligence assistants with plugins and memory-like context.

Vellum combines orchestration, evaluation and production AI-development tooling and in 2026 expanded into persistent personal-intelligence assistants with plugins and memory-like context.

Vellum's official seed announcement records a completed $5 million seed round backed by Y Combinator, Rebel Fund, Pioneer Fund and Eastlink Capital, separate from its later Series A.

Vellum raised a $20M Series A in 2026 to scale production AI deployments and continues shipping agent, evaluation and assistant products.

Vellum raised a $20M Series A in 2026 to scale production AI deployments and continues shipping agent, evaluation and assistant products.

Vellum provides an end-to-end AI development stack spanning prompts, workflows, deployments, SDKs/APIs, developer tools, Agent Builder and evaluation/test suites, supporting transferable skills across agent design, workflow automation, AI evaluation and production application deployment.

AI orchestration, evaluation, prompting, observability and agent-development skills transfer exceptionally broadly across applied AI and developer-platform roles.

AI orchestration, evaluation, prompting, observability and agent-development skills transfer exceptionally broadly across applied AI and developer-platform roles.