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Dev tools · alternatives · 2026

24 alternatives to Lotus

Open-source pricing & billing

Lotus is an open-source pricing and billing engine that handles usage-based, per-seat, and custom pricing models. It provides a real-time system for optimizing and testing pricing strategies while managing metering… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Lotus launched in 2023; newer entries below may have overtaken it.

  1. 1

    Hi HN! We’re building an open-source pricing & packaging engine for SaaS with a built-in billing system. (https://github.com/uselotus/lotus). We strongly believe pricing is the largest untapped growth lever for SaaS, primarily because pricing affects so many critical systems that don’t talk to each other (billing, payments, feature limits, metering, and CRM). We’re building this infrastructure to fix this and enable quick experimentation. Lotus acts as a central repository for all of your pricing plans and utilizes your payment gateway, to manage usage-based, per-seat,…

    2022 · github.com · its alternatives →

  2. 2LO

    Hey HN! We discovered that no one innovates on pricing because every billing software is inflexible. Excited to share our progress with Lotus entering beta (full MIT license, https://github.com/uselotus/lotus). New features: * backtest and run analysis comparing multiple plans * version pricing plans like you version code * Meter and aggregate usage flexibly with custom SQL * billing for usage-based pricing, hybrid, bespoke contracts * generate invoice pdfs or integrate with Stripe, Braintree, Netsuite, Salesforce * webhooks to send alerts when usage thresholds are high…

    2023 · demo.uselotus.io · its alternatives →

  3. 3
    Lago▲1,013

    Open-source alternative to Stripe Billing and Chargebee

    2023 · getlago.com · its alternatives →

  4. 4

    AI-native billing & payments for usage-based AI products

    Jun 2026 · its alternatives →

  5. 5

    Automated metering and billing for usage based pricing

    2023 · its alternatives →

  6. 6
    OpenMeter▲459

    Usage metering for engineers

    2023 · openmeter.io · its alternatives →

  7. 7

    AI Pricing Generator for your Product or SaaS

    2024 · pricingmaker.com · its alternatives →

  8. 8

    Open source billing UI components

    2025 · billingsdk.com · its alternatives →

  9. 9
    Credyt▲100

    Hey HN! I'm the founder of Credyt (https://credyt.ai). If you're running an AI product that burns $0.50+ per interaction, you need to bill customers as usage happens, not at the end of the month. Otherwise you're a bank for your customers, and you'll run out of money before they do. Why invoice-based billing doesn't work for AI: Most usage-based billing tools (Stripe Billing, Orb, etc.) were built for SaaS. They meter usage all month, then send an invoice. That works fine when your COGS is 5%. It's a disaster when you're paying your AI vendor upfront for every request and your…

    Nov 2025 · credyt.ai · its alternatives →

  10. 10
    Paigo▲267

    Automate billing for any pricing, 0% transaction fee forever

    2023 · its alternatives →

  11. 11
    UnitPay▲165

    Price, bill, and prove value for your AI product

    Jul 2026 · useunitpay.com · its alternatives →

  12. 12
    Swallow▲216

    Pricing infrastructure for modern insurers - AI & No-Code

    2023 · swallow.app · its alternatives →

  13. 13
    AiPrice▲96

    API for calculating OpenAI LLM tokens and pricing

    2023 · aiprice.dev · its alternatives →

  14. 14

    Usage-based billing for APIs — real-time rating

    Mar 2026 · its alternatives →

  15. 15

    Calculate and compare the cost of the latest LLM APIs

    2024 · docsbot.ai · its alternatives →

  16. 16
    Amberflo▲157

    Cloud metering and usage-based pricing and billing for SaaS

    2022 · amberflo.io · its alternatives →

  17. 17

    Invoicing made simple

    2018 · billingengine.com · its alternatives →

  18. 18

    LLMs price comparison tool developed and updated by LLM

    2024 · ailesson.io · its alternatives →

  19. 19
    QuickBill▲164

    A simple tool to create unlimited free invoices.

    2017 · punitgr.github.io · its alternatives →

  20. 20FO

    Hey HN, I’am Koshima, co-founder of Flexprice (https://flexprice.io/). Flexprice is an open source monetization platform for AI & Agentic companies. You can build usage-based, credit-based, or hybrid pricing models with full control. Usage-based billing works on paper, but breaks fast in production: (1) High-volume data (e.g., 10k API calls/sec from AI inferences) breaks naive pipelines, dropping events and causing underbilling or customer complaints. (2) Backfilling missing events or retroactive discounts screws up invoices, forcing 3 AM log stitching to avoid revenue…

    2025 · its alternatives →

  21. 21

    Get paid promptly with software that makes it simple to create, send and manage invoices.

    2013 · invoiceomatic.io · its alternatives →

  22. 22

    Outcome Billing and Payments Infrastructure for AI Agents

    2023 · valmi.io · its alternatives →

  23. 23

    Build a custom billing system in minutes with just config

    2025 · billingrails.com · its alternatives →

  24. 24

    Estimate price for using different AI model API's

    2025 · tap2solve.com · its alternatives →

Also compare

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →