Comparison · June 2026
SpendProxy vs LiteLLM
LiteLLM is an open-source (MIT, with a commercially-licensed enterprise directory) LLM gateway: one OpenAI-format API across 100+ providers, with virtual keys, spend tracking, budgets, caching, and a flexible router. It is one of the most widely used tools in the category (~50K GitHub stars).
What LiteLLM is genuinely good at
- ✓Widest provider coverage in the category, all in OpenAI format
- ✓Large, active open-source community
- ✓Granular multi-tenant spend attribution (key/user/team/customer)
- ✓Generous OSS tier: budgets, virtual keys, guardrails, load balancing all free
Side by side
| LiteLLM | SpendProxy | |
|---|---|---|
| Primary job | Unified gateway: auth, load balancing, spend tracking across 100+ providers | Cut LLM spend: billing-accurate cost tracking plus optimization engines that act on traffic |
| Request path | Inline self-hosted proxy | Inline proxy — one base-URL change |
| Hosting & data path | Self-hosted (Postgres required, Redis recommended for multi-instance) | Licensed Docker container inside your VPC. SQLite-local storage. No request data leaves your network. |
| Automatic cost optimization | Admin-configured rules: cache-injection points, complexity-router tiers, and semantic routes all need to be written and maintained by you; budgets block but never adapt | Five engines that take action: prompt cache injection, response dedup, model routing with circuit breaker, budget guardrails, retry-storm suppression. Each runs in off, monitor (log what it would do), or autopilot mode. |
| Cost tracking | Community pricing map (model_prices JSON) that you sync; their own docs list cost-discrepancy sources including stale pricing and cached-token edge cases | Provider-specific billing semantics: cached tokens, reasoning tokens, and streaming priced the way the provider actually bills. |
| Budgets & enforcement | Layered budgets and TPM/RPM limits per key/team/user — blocked with error when exceeded | Per route, tag, or API key — warn or hard-block. |
| Provider coverage | 100+ providers | OpenAI, Anthropic, Google Gemini. Deliberately deep on three providers rather than broad. |
| Source / license | Open source, MIT (enterprise/ dir commercially licensed) | Commercial. Licensed, air-gapped container. |
| Pricing | OSS free · Enterprise custom (SSO, audit logs, SLAs) | $2,500 30-day pilot, then $1,500/mo flat. |
Choose LiteLLM when
- →You need many providers unified today, at zero license cost
- →You have the platform team to own configs, Postgres, Redis, and pricing-map syncs
- →Multi-tenant key management is your core need
Choose SpendProxy when
- →You want the optimization layer to work out of the box — engines discover the savings themselves and show them in monitor mode before acting
- →Billing-accurate costs matter: SpendProxy prices cached and reasoning tokens the way providers bill, and ships pricing updates with the product
- →One container, SQLite-local, no Postgres/Redis to operate
See it on your own traffic
30-day pilot inside your VPC. Monitor mode shows exactly what each engine would save before anything changes. If the numbers aren't there, you'll know in week one.
LiteLLM facts verified June 2026 against their official documentation. If anything here is out of date, email hi@spendproxy.com and we'll fix it.