Metronome is the usage-based billing engine behind companies like OpenAI, HubSpot and Cribl — it tracks metered usage in real time and lets you deploy pricing changes in under an hour without engineering work. Stripe bought it in January 2026, which is either a strong vote of confidence or a reason to wonder what happens to the roadmap next, depending on who you ask. But Metronome is also built specifically for pure usage-based pricing at scale — if your real problem is bespoke B2B contracts, revenue recognition, or you just want to avoid a percentage-of-revenue fee, a different tool might fit better. Here are four real ones, with what they cost and who they actually fit.
1. Solvimon — billing infrastructure built by the team that ran Adyen's engine
Solvimon was founded by the team that built Adyen's internal billing engine at roughly €1 trillion/year in processed volume, and it's aimed at companies whose pricing is a messy mix of seats, usage and credits and who are heading toward IPO-grade financial rigor. Unlike several competitors that only quote pricing after a sales call, Solvimon publishes its per-event pricing openly.
Pricing: roughly €14.95/month base plus tiered fees starting at €0.0099/event; the first $3M of billed volume is free for AI startups.
Where it falls short: it's more infrastructure than a small team with simple pricing actually needs, it's a young product (2026) with modest but fast-growing revenue ($5.8M MRR, +43% YoY), and per-event fees add up quickly at very large scale without negotiating a custom deal.
2. Sequence — for bespoke, contract-by-contract B2B deals
Sequence takes a narrower approach: it turns a signed sales contract directly into a billing schedule and, eventually, correctly recognized revenue — built for B2B SaaS companies where every deal has genuinely different terms rather than one standard price list. The founding team came from Intercom, Monzo, Palantir, Plaid, Wise and Auth0, and it's backed by Andreessen Horowitz and Salesforce Ventures.
Pricing: no public pricing — you go through a sales demo to get a number.
Where it falls short: the lack of public pricing makes it hard to comparison-shop, its efficiency claims (like a 90% reduction in closing time) are vendor-reported rather than independently verified, and it's overkill if your pricing isn't actually negotiated deal-by-deal.
3. Zenskar — billing without a cut of your revenue
Zenskar handles billing and revenue recognition with a specific promise: a flat subscription fee instead of a percentage of everything you bill, which is how some competitors in this space charge. An AI agent ingests invoices and contracts automatically, and it connects to 100+ tools including Stripe, Salesforce, HubSpot and NetSuite.
Pricing: three tiers (Starter, Standard, Enterprise), all quote-based, but with a free sandbox to test before committing.
Where it falls short: despite the transparency pitch on its fee model, there's still no public pricing to compare against competitors, it's on a recent Series A ($15M) with a limited track record, and it's less built for highly complex custom contracts than Sequence.
4. Alguna — no-code billing control for finance teams, not engineers
Alguna covers the full quote-to-cash cycle — CPQ, invoicing, usage tracking and revenue books — in one no-code tool, so a finance or ops person can change a pricing plan without asking an engineer to touch code. It's Y Combinator-backed and SOC 2 Type II certified, with self-serve onboarding instead of a mandatory sales call.
Pricing: Starter is free (10 invoices/month, metering, Stripe integration); Growth is $699/month (adds CPQ, e-signature, advanced integrations); Enterprise is custom.
Where it falls short: the jump from a free Starter plan to $699/month Growth is steep, it's a young product off a recent YC round with less of a track record, and it's less hardened for pure enterprise use than Sequence or Solvimon.
How they compare
| Tool | Best for | Starting price | Public pricing? |
|---|---|---|---|
| Metronome | Pure usage-based billing at scale | 0.8% beyond $100K volume | Partially |
| Solvimon | IPO-grade billing rigor, transparent per-event pricing | €14.95/mo + €0.0099/event | Yes |
| Sequence | Bespoke, contract-by-contract B2B deals | Custom quote only | No |
| Zenskar | No percentage-of-revenue billing fee | Custom quote (free sandbox) | No |
| Alguna | No-code billing for finance/ops teams | Free, then $699/mo | Yes |
If your pricing is genuinely usage-metered and you're already deep in the Stripe ecosystem, Metronome is still a reasonable default. If every deal your sales team closes has different terms, Sequence is built specifically for that mess. If you want to avoid a revenue-percentage fee, Zenskar's flat pricing is the more honest deal on paper — and if you'd rather have finance change prices without filing an engineering ticket, Alguna's no-code approach and real free tier make it the easiest to actually try first.