Go96Exceptionalhealth index

getlago/lagoOpen Source Metering and Usage Based Billing API ⭐️ Consumption tracking, Subscription management, Pricing iterations, Payment orchestration & Revenue analytics
Go · Shell★ 10.6KSep 19, 2026
PyPI83Excellenthealth index
Python★ 55↓ 33.2K/moSep 12, 2026
Go81Excellenthealth index

agentstation/starmapAn auto-updating AI Model Catalog - Single binary CLI, REST/SSE Server - SDKs - Golang Package.
Go★ 4Sep 19, 2026
npm81Excellenthealth index

epilot-dev/pricingA library that provides pricing utility operations for Pricing Entities within the epilot 360 Platform & User Journeys.
TypeScript★ 1↓ 23K/moSep 10, 2026
PyPI · npm78Goodhealth index
Python★ 56↓ 1,078/moOct 16, 2026
PyPI · crates.io · npm78Goodhealth index

rust-dd/stochastic-rsHigh-performance quantitative finance in Rust — 120+ stochastic processes, option pricing, calibration, fixed income, risk & copulas, with SIMD/GPU acceleration and Python bindings.
Rust★ 183↓ 9,038/moSep 14, 2026
Go · npm77Goodhealth index

getvelox/veloxOpen-source, self-hosted billing for AI products: price tokens by model, sell prepaid credits, see margin per customer, and charge through Stripe without the Stripe Billing fee.
Go · TypeScript★ 5Oct 20, 2026

cendorhq/cendor-libsProduction plumbing for LLM apps: context, cost, testing & governance — composable, framework-agnostic Python libraries.
Python★ 0↓ 1,180/moOct 21, 2026
Python★ 23↓ 1,629/moSep 18, 2026
PyPI · crates.io · Go71Goodhealth index

benbenbang/libitofinHigh-performance quantitative finance library in Rust: pricing, risk, and numerical tools built for speed and safety.
Rust★ 57↓ 2,310/moSep 21, 2026
PyPI · Go · npm69Goodhealth index
Python · Go · JavaScript★ 1↓ 176/moSep 13, 2026
Python★ 1↓ 3,546/moOct 17, 2026
npm63Moderatehealth index
TypeScript★ 0↓ 573/moSep 5, 2026
crates.io59Moderatehealth index

meteroid-oss/meteroid-rustOfficial Rust SDK for Meteroid, the open-source billing platform: subscriptions, invoicing, usage-based billing and webhooks.
Rust★ 0↓ 2,357/moOct 7, 2026

zkrebbekx/tariffUsage-based billing rating for Go — tiered, volume, package and per-unit pricing to exact line items. Zero dependencies, no float, no infra.
Go · JavaScript★ 1Sep 16, 2026
PyPI57Moderatehealth index
Python★ 1↓ 3,265/moSep 10, 2026
PyPI54Moderatehealth index

qmediat/ai-costWhat a block of AI-assisted work cost — real, API-equivalent, vendor quote — from the usage already on disk (Claude Code, Codex CLI, Gemini CLI, Grok Build CLI, your own logs)
Python★ 0↓ 2,209/moOct 20, 2026
Go★ 0Sep 12, 2026
Python★ 22↓ 20/moAug 24, 2026

absolutejs/billingPure cost-model substrate for the AbsoluteJS PaaS. createPlan + computeInvoice turn @absolutejs/metering usage snapshots into integer-micros invoices — no float drift, no SDK peers.
TypeScript★ 0↓ 2,014/moSep 6, 2026