Side-by-side

Not Diamond vs Vellum

Not DiamondVellum

Bottom line: Not Diamond for teams running multiple LLMs in production; Vellum for teams wanting an all-in-one build-evaluate-deploy platform.

	Not Diamond Intelligent LLM router that picks the best model per query Visit	Vellum Build, evaluate, and deploy LLM apps and agents with confidence. Visit
Votes	0	0
Pricing	Freemium	Freemium
Category	Coding	Coding
Tags	llm-routermodel-routingcost-optimizationai-infrastructurellmops	llmopsai-agentsprompt-engineeringevaluationworkflow
Best for	Teams running multiple LLMs in production Builders of coding and AI agents Cost-sensitive LLM applications	Teams wanting an all-in-one build-evaluate-deploy platform Cross-functional groups with technical and non-technical members Regulated sectors needing VPC or HIPAA options
Pros	Directly targets cost savings without quality loss Supports custom routers trained on your own data Low added router latency (cited ~100-150ms) Free early-access tier to evaluate Works with major providers and coding agents	Combines prompt, workflow, evaluation, and deployment in one platform Visual workflow builder lowers the barrier for cross-functional collaborators Solid evaluation and testing tooling for pre-production quality gates Multi-provider model support avoids lock-in Free tier lets teams trial without a credit card
Cons	Routing benefits depend heavily on your specific workload Exact per-token pricing is not fully published Vendor-cited savings figures need independent validation Adds an external dependency and network hop Crowded, fast-moving competitive category	Pricing is opaque and sales-led, making budgeting hard Not open source, and self-hosting is locked to Enterprise Free tier is quite limited in credits, documents, and seats Smaller company and funding than infrastructure incumbents Frequent repositioning can mean shifting product focus

Comparison generated from each tool's listing. Add or remove tools above to change it.