Helicone
the gateway and the observability layer in one apache 2.0 codebase
the cleanest open-source licence in the category paired with a real 0% token markup, let down by overage rates you cannot read off the page.
helicone is apache 2.0 at the root with no second licence file anywhere in the tree, including the web directory — the only one of the three self-hostable options here where we found no open-core split at all. saml sso and on-prem support are sold as enterprise services rather than gated behind a licence key, which is a meaningfully different arrangement from litellm's per-seat enterprise licence.
the token markup is genuinely zero, and the docs say so while naming openrouter's 5.5% by way of comparison. byok is supported. helicone makes its money on requests and storage instead: the hobby tier covers 10,000 requests a month, pro is $79 for an organisation with unlimited seats, and team is $799 for five organisations with three-month retention.
the description above is ours, condensed from the ranking. pricing moves — check it on the vendor's own page before you rely on it.
- category
- llm gateways
- pricing
- $79/mo (pro)
- website
- helicone.ai
the cleanest open-source licence in the category paired with a real 0% token markup, let down by overage rates you cannot read off the page.
we researched this category against vendors' own pricing pages and licence files. that is where this line comes from — not from the vendor, and not from anything they paid for.