Autumn is an open-source billing logic layer that sits on top of Stripe, giving developers a single API for plans, usage tracking, feature gating, and AI…
Best for Autumn: AI-first and dev-first startups already built around Stripe that want an open-source, self-hostable API for feature gating and usage/AI-credit metering without writing custom billing logic - Autumn is used in production by Mintlify and Firecrawl.
Best for Hyperline: SaaS companies that need formal sales quoting (CPQ), compliant invoicing across 100+ countries, and native connections to Stripe, GoCardless, Mollie, and Airwallex, and are comfortable with a $199/month plus 0.6% of revenue starting price.
At a Glance
Autumn
Hyperline
Primary category
Invoicing
Invoicing
Rating
Not documented
Not documented
Pricing model
Freemium
Subscription plus usage fee
Starting price
Free
$199/month + 0.6% of billed revenue
Free plan
Yes
Not documented
Free trial
Not documented
Yes
Platforms
Web
Web
Team collaboration
Not documented
Not documented
AI features
Yes
Not documented
Public API
Yes
Yes
Key Differences
Pricing Model & Transparency
Autumn: Autumn is freemium but does not fully publish its cloud pricing tiers according to its own documented cons.
Hyperline: Hyperline publishes exact tiers: Quote to Cash at $199/month + 0.6% of revenue, Quote to Cash + Usage at $299/month + 0.7% of revenue, and a custom High Volume tier for companies over $5M ARR.
A flat unknown SaaS fee versus a percentage-of-revenue model changes how costs scale as a company grows.
Open Source & Self-Hosting
Autumn: Autumn is fully open source under Apache 2.0 on GitHub and can be self-hosted.
Hyperline: Hyperline is delivered as hosted SaaS, certified SOC2, ISO27001, and GDPR, with no self-hosting option documented.
Self-hosting removes vendor lock-in and gives engineering teams direct code-level control.
CPQ & Sales Quoting
Autumn: Autumn supports self-serve and custom enterprise billing from one source of truth but does not document a dedicated CPQ feature.
Hyperline: Hyperline includes a named CPQ (Configure, Price, Quote) feature for streamlining quote creation and contract management.
Sales-led SaaS companies need formal quoting and contract workflows that a pure billing-logic API doesn't provide.
Global Invoicing Compliance
Autumn: Not documented for Autumn.
Hyperline: Hyperline supports compliant invoicing and e-invoicing certification across 100+ countries.
Companies selling internationally must meet local e-invoicing and tax regulations that not every billing tool handles.
AI Credit & Usage Metering Focus
Autumn: Autumn is purpose-built for AI startups billing on usage and AI credits, with feature gating (check) and usage tracking (track) as core primitives.
Hyperline: Hyperline offers usage-based billing via real-time event ingestion, metered and seat-based billing, available on the Quote to Cash + Usage plan at $299/month + 0.7% of revenue.
Both meter usage, but Autumn is scoped around AI token/credit billing while Hyperline treats usage as one input into a broader revenue platform.
Feature-by-Feature
Billing Infrastructure
Feature
Autumn
Hyperline
Usage-based / metered billing
Available
Available
Feature gating
Available
Not documented
CPQ (quote/contract generation)
Unavailable
Available
AI credit billing
Available
Not documented
Integrations & Compliance
Feature
Autumn
Hyperline
Stripe integration
Available
Available
Multi-payment provider support
Not documented
Available
CRM integrations
Not documented
Available
SOC2 / ISO27001 / GDPR certification
Not documented
Available
Deployment & Pricing
Feature
Autumn
Hyperline
Self-hosting
Available
Unavailable
Free trial
Not documented
Available
Published starting price
Not documented
Available
Revenue-percentage fee
Not documented
Available
Pricing Compared
Starting price reflects the lowest paid tier, not the full cost for every team size or usage level.
Autumn
No individual plan breakdown documented yet.
Hyperline
Quote to Cash — $199/month + 0.6% of billed revenue Monthly
Quote to Cash + Usage — $299/month + 0.7% of billed revenue Monthly
Quote to Cash + High Volume — Custom pricing Custom
Pros & Cons
Autumn
Pros
Reduces custom billing engineering work for SaaS teams
Free tier available to get started
Built on Stripe, retaining Stripe's payment compliance and reliability
As a newer platform (founded 2024), long-term ecosystem maturity is still developing
Requires a Stripe account since Autumn is a layer on top of Stripe rather than a standalone processor
Paid tier pricing details require checking current plans as the product evolves
Hyperline
Pros
Combines CPQ, billing, payments and revenue recognition in one connected workflow.
Transparent, publicly published pricing rather than sales-gated quotes.
Payment-processor flexibility across four major PSPs instead of vendor lock-in.
Purpose-built for usage-based and hybrid pricing models that many legacy billing tools handle poorly.
Backed by well-known SaaS-focused investors with founders drawn from the Qonto, Spendesk and Primer network.
Cons
Revenue-percentage-based pricing, 0.6 to 0.7 percent of billed revenue, can get expensive at scale compared to flat-fee competitors.
Relatively young company, founded in 2022, with a shorter track record than incumbents like Chargebee or Zuora.
CRM and accounting integrations carry an additional per-integration monthly fee.
Smaller team size than larger, established billing platforms may mean a leaner support organization.
High-volume enterprise pricing is custom and not published, requiring a sales conversation.
Use Cases
Choose Autumn: AI-first and dev-first startups already built around Stripe that want an open-source, self-hostable API for feature gating and usage/AI-credit metering without writing custom billing logic - Autumn is used in production by Mintlify and Firecrawl.
Choose Hyperline: SaaS companies that need formal sales quoting (CPQ), compliant invoicing across 100+ countries, and native connections to Stripe, GoCardless, Mollie, and Airwallex, and are comfortable with a $199/month plus 0.6% of revenue starting price.
Need both: Realistically unlikely - both are billing infrastructure layers competing for the same usage-metering and subscription-management need, so most teams pick one rather than run two overlapping billing systems; a company might only consider Autumn for developer-facing feature gating and AI credits while using Hyperline separately for sales-facing CPQ and multi-country invoicing.
Autumn
SaaS pricing plan management — Defining and updating pricing plans without rewriting billing code each time.
Usage-based billing — Tracking metered usage and enforcing feature limits via API.
Hyperline
Scaling B2B SaaS billing operations — Replacing spreadsheets or ad hoc invoicing with automated subscription billing, tax handling and dunning as a company grows past its early customers.
Usage-based and consumption pricing — Metering API calls, seats or other consumption units in real time and billing customers automatically based on actual usage.
Sales-to-invoice workflow automation — Letting sales reps generate, approve and e-sign quotes that flow directly into subscriptions and invoices without manual handoffs to finance.
Frequently Asked Questions
Is Autumn open source while Hyperline is not?
Yes. Autumn is fully open source under Apache 2.0, with its source available on GitHub, and can be self-hosted. Hyperline is offered only as hosted SaaS.
How does Hyperline's pricing compare to Autumn's?
Hyperline publishes exact pricing: $199/month + 0.6% of revenue for Quote to Cash, up to a custom High Volume tier for companies above $5M ARR. Autumn is freemium but has not fully published its cloud pricing tiers.
Does either tool replace Stripe?
No. Autumn explicitly sits on top of Stripe as a billing logic layer rather than replacing it, while Hyperline natively integrates with Stripe alongside GoCardless, Mollie, and Airwallex for payment collection.
Which tool is better for AI startups billing by usage credits?
Autumn is purpose-built for AI startups billing on usage and AI credits and is used in production by companies including Mintlify and Firecrawl.
Does Hyperline offer a free trial?
Yes, the Quote to Cash plan includes 10 free invoices to start, with no credit card required.
Which tool includes CPQ for sales quoting?
Hyperline includes a dedicated CPQ (Configure, Price, Quote) feature; a CPQ feature is not documented for Autumn.