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Prompt Proxy vs Serial Subscriptions
Short answer: Pick Prompt Proxy if you want plug-and-play AI billing backend; pick Serial Subscriptions if you want unified auth and billing platform. Both have a free plan.
Prompt ProxyThe billing back-end for your AI apps
Serial SubscriptionsUnify auth, payments, subscriptions, and usage in one integrationWhich to pick
Pick Prompt Proxy if you want…
- Plug-and-play AI billing backend
- Integrations with Polar, Google Play Store or Apple App Store (on Prompt Proxy's list, not Serial Subscriptions')
Pick Serial Subscriptions if you want…
- Unified auth and billing platform
- Unified SaaS integration
Side by side
- What it is
- Prompt Proxy:Prompt Proxy provides billing, credit management, and auth integration for AI apps with three lines of code.
- Serial Subscriptions:Serial Subscriptions provides a single integration for auth, payments, subscriptions, usage tracking and custom billing logic.
- Best for
- Prompt Proxy:Plug-and-play AI billing backend
- Serial Subscriptions:Unified auth and billing platform
- Who it’s for
- Prompt Proxy:AI app developers who need quick payment and usage tracking.
- Serial Subscriptions:Indie developers, solo founders and AI creators building SaaS products.
- Pricing
- Prompt Proxy:Freemium
- Serial Subscriptions:Freemium
- Free plan or trial
- Prompt Proxy:Free trial
- Serial Subscriptions:—
- Works with
- Prompt Proxy:Stripe, Polar, Google Play Store, Apple App Store, Firebase, Supabase, Auth0, OpenAI
- Serial Subscriptions:Stripe
Prompt Proxy features
- Payment Provider Sync. Connect Stripe, Polar, Google Play or Apple App Store to sell credits and handle webhooks automatically.
- Credit Management. Deduct user credits per LLM call with usage-based pricing (per-token, per-request, or rate-limited).
- Auth Integration. Link existing Firebase, Supabase or Auth0 JWTs to user credits without writing auth code.
- Fraud Protection. Built-in rate limiting and abuse detection to protect revenue.
- LLM Provider Support. Proxy calls to OpenAI, Anthropic or OpenRouter via any SDK such as Langchain.
- Developer Dashboard. Real-time credit tracking, subscription management and 99.9% SLA monitoring.
Serial Subscriptions features
- One-click integration. Connect to Stripe, add branding and configure in minutes with just a few lines of code.
- Unified auth & org management. Handles login, organizations, roles and user permissions together with billing.
- Flexible billing models. Supports tiered, usage-based and ASC 606-compliant billing with automated revenue recognition.
- Branded UI/UX flows. Customizable pricing pages, dashboards and invoices without building custom screens.
- Scalable infrastructure. Zero lock-in, 99.9 % uptime and can grow from indie to enterprise workloads.
- Audit-ready logs. Provides audit trails and compliance data for CPAs and CFOs.
Prompt Proxy vs Serial Subscriptions FAQ
What is the difference between Prompt Proxy and Serial Subscriptions?+
Serial Subscriptions: Unifies auth, payments and usage but targets generic SaaS, not AI-specific credit flows.
Should I use Prompt Proxy or Serial Subscriptions?+
Pick Prompt Proxy if you want plug-and-play AI billing backend or integrations with Polar, Google Play Store or Apple App Store (on Prompt Proxy's list, not Serial Subscriptions'). Pick Serial Subscriptions if you want unified auth and billing platform or unified SaaS integration.
Is Prompt Proxy or Serial Subscriptions free?+
Prompt Proxy has a free plan and paid plans. Serial Subscriptions has a free plan and paid plans.
Do Prompt Proxy and Serial Subscriptions integrate with the same tools?+
Partly. Both list Stripe. Prompt Proxy also lists Polar, Google Play Store, Apple App Store, Firebase and 7 more.
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.