Delv
No Code Builderby Vellum★ 3.8

Vellum

End-to-end AI development platform with an agent builder, version control, testing and monitoring for production LLM apps.

Try it
C
Safety & Trust

Delv Safety Grade: C

Score 58/100 · assessed 2026-04-18

Maintainer65
Permissions50
Supply chain40
Transparency45
Incidents100

Vellum is a commercial LLMops platform from a venture-backed startup offering agent building, version control, and monitoring for production AI applications. The company appears legitimate with enterprise customers, but operates as a closed-source SaaS with no public repository or open-source components. As a no-code builder platform, it requires broad permissions to orchestrate LLM calls, manage workflows, and potentially integrate with external services. The lack of transparent code review, dependency visibility, or community audit creates supply chain opacity. Pricing requires contact, suggesting enterprise focus. No known security incidents, but the closed nature limits independent verification of security practices. Suitable for organisations comfortable with proprietary tooling and vendor lock-in, but transparency-conscious teams may prefer open alternatives.

Green flags

  • Legitimate venture-backed company with enterprise customer base
  • Purpose-built for production LLM operations with version control
  • No known security incidents or breaches in public record
  • Enterprise focus suggests professional security practices

Red flags

  • No public repository or open-source code for independent security review
  • Closed-source SaaS with opaque supply chain and dependency management
  • Contact-only pricing suggests vendor lock-in risk for enterprise customers
  • Broad platform permissions required for agent orchestration unclear
  • Limited transparency into data handling and model access patterns

Permissions requested

Outbound networkExternal LLM callAccess secretsDB readDB write
Assessed by Delv Editorial using public metadata. Grades are advisory and update as the ecosystem changes. They do not replace your own review of permissions and code before granting an agent access to sensitive systems.

Pricing

PAID — Contact for pricing

Platforms

webapi

Review

Vellum sits in the awkward middle ground between notebook prototyping and full production infrastructure. It's a no-code platform for building LLM agents, complete with version control, A/B testing, and monitoring dashboards. The pitch is that you can go from prompt sketch to production deployment without writing orchestration code. The autonomy here is mostly in the workflow builder. You chain together prompt nodes, API calls, and conditional logic in a visual canvas. The agent executes these steps, handles retries, and logs everything. It's not autonomous in the sense of a self-directed research assistant. It's more like a state machine with LLM steps that you don't have to code by hand. Where it shines: teams that need to iterate on prompts quickly and ship to production without engineering bottlenecks. I've seen it work well for customer support triage agents where the logic is stable but the prompts need constant tuning. The version control is genuinely useful. You can roll back to a previous prompt version, compare outputs side by side, and deploy the winner. The monitoring dashboard shows you which steps fail, how often users hit rate limits, and where latency spikes. Failure modes: the visual builder gets messy fast. Once you're chaining more than five or six nodes, you're essentially debugging a flowchart. Conditional logic is clunky compared to writing actual code. And the no-code promise falls apart the moment you need custom integrations. You'll end up writing API wrappers anyway. Compared to LangSmith or Humanloop, Vellum leans harder into the no-code builder. LangSmith assumes you're writing code and gives you observability. Humanloop splits the difference. Vellum is for teams that want to avoid code entirely, at least until complexity forces their hand. Pricing is contact-only, which usually means enterprise budgets. For a solo developer or small team, that's a red flag. You're paying for the convenience of not writing orchestration code, but you're also locked into their platform. If you outgrow it, migration is painful. One concrete workflow: a legal tech company used it to build a contract review agent. The agent extracts clauses, checks them against a compliance database, and flags risks. The legal team tweaks prompts without waiting for engineering. That's the sweet spot. The moment they needed custom PDF parsing, they hit the platform's ceiling.
Verdict

Worth it for non-technical teams shipping production agents with stable logic and evolving prompts. Skip it if you're comfortable writing code or need deep customisation. The no-code promise has a short shelf life.

Good at

  • Version control and A/B testing for prompts is genuinely useful
  • Monitoring dashboard shows failures and latency without custom instrumentation
  • Non-engineers can iterate on agents without waiting for developers
  • Handles retries and error logging out of the box

Watch out

  • Visual builder becomes unmanageable with complex workflows
  • Contact-only pricing likely means enterprise budgets
  • Platform lock-in makes migration painful if you outgrow it
  • Custom integrations still require code, breaking the no-code promise
  • Conditional logic is clunky compared to writing actual code

Use cases

  • agent prototyping
  • prompt versioning
  • production monitoring