Stripe vs Lago: A Deep-Dive Open Source Comparison

• Stripe: While Stripe handles basic subscriptions well, configuring multi-dimensional usage-based plans requires complex workaround structures. For example, setting up prepaid credits or handling graduated tiering with custom enterprise overrides often forces developers to write extensive custom code outside of Stripe to manually compute invoice adjustments.
• Lago: Lago was built from day one for hybrid and metered billing. It natively supports advanced billing concepts out of the box:
  • Prepaid Credits: Allow customers to purchase credits upfront that automatically deplete based on real-time usage.
  • Graduated and Volume Tiering: Automatically transition customers to lower per-unit pricing as usage crosses specific thresholds.
  • Commitment & Minimum Spend: Enforce minimum contract values dynamically over monthly or annual cycles.

3. Infrastructure Control & Data Lock-In

For platform architects, where your billing data lives is just as important as how it is calculated.

• Stripe: All of your subscription states, pricing logs, and historical usage metrics are locked inside Stripe’s proprietary database. If you decide to transition to another billing system, you must run a high-risk database migration, coordinates export scripts with Stripe’s support team, and rebuild your entire billing engine from scratch.
• Lago: With self-hosted Lago, your data remains 100% yours. Every table in the PostgreSQL database is completely accessible to your engineering team. You can write direct SQL queries to generate custom internal dashboards, pipe billing data straight to your snowflake data warehouse, or modify the open-source codebase to implement custom, proprietary billing logic that no off-the-shelf SaaS provider could ever support.

Pricing Comparison & Total Cost of Ownership (TCO)

To understand the true cost difference, let’s look at a realistic scenario for a mid-market B2B SaaS company generating $10,000,000 in Annual Recurring Revenue (ARR), with $4,000,000 of that volume derived from metered/usage-based pricing.

The Stripe Monolithic Cost Model

If you use Stripe for both payment processing and billing orchestration, your annual bill will scale directly with your revenue:

1. Stripe Core Gateway Fees: 2.9% + 30¢ per transaction. Assuming an average transaction size of $200 (approx. 50,000 transactions/year): $$\text{Processing Fees} = (10,000,000 \times 0.029) + (50,000 \times 0.30) = $305,000$$
2. Stripe Billing Add-on Fees: Stripe charges 0.7% on recurring volume (or 0.5% with custom enterprise pricing). $$\text{Billing Engine Fees} = 10,000,000 \times 0.007 = $70,000$$
3. Stripe Tax Add-on Fees: Assuming Stripe Tax is enabled on 50% of transactions to manage sales tax compliance (0.5% per transaction): $$\text{Tax Engine Fees} = 5,000,000 \times 0.005 = $25,000$$

• Total Annual Stripe Cost: $400,000 (of which $95,000 is solely for billing/tax software overhead).

The Decoupled Lago + Stripe Payments Model

By moving your billing state to self-hosted Lago, you eliminate Stripe Billing fees entirely while keeping Stripe solely as your low-level payment rail:

1. Stripe Core Gateway Fees: Still applies, as Stripe is processing the credit cards: $305,000.
2. Lago License Fee (Self-Hosted AGPL-3.0): $0 (Free).
3. Lago Infrastructure/Hosting Cost: Running Lago on AWS (ECS, RDS Postgres, and ElastiCache Redis) to handle millions of monthly events: approx. $450/month ($5,400/year).
4. Engineering Maintenance Cost: Estimating 40 developer hours per year for updates and infrastructure monitoring (at $150/hr internal cost): $6,000/year.

• Total Annual Decoupled Cost: $316,400.

Net Annual Savings with Lago: $83,600 at $10M ARR. As your ARR scales to $50M or $100M, these software savings easily compound into hundreds of thousands of dollars annually.

Who Should Choose Stripe?

Stripe remains the ideal billing solution for organizations that fit these profiles:

1. Early-Stage Startups with Flat-Rate Models: If you are launching an MVP with simple monthly flat-rate plans (e.g., $19/month per seat), Stripe’s out-of-the-box billing engine is incredibly fast to implement, letting you focus on product-market fit.
2. Non-Technical Teams Lacking Dedicated DevOps Resources: If your company does not have a dedicated engineering or platform team to manage self-hosted infrastructure, databases, and Docker images, paying Stripe’s convenience tax is a rational trade-off.
3. Companies Needing an All-in-One Compliance Wrapper: If you require instant, automated sales tax calculations, localized payment methods, and fraud prevention with zero custom integration work, Stripe’s unified ecosystem is highly efficient.

Who Should Choose Lago?

Lago is designed specifically for technical organizations that require infrastructure-level control:

1. High-Volume Usage-Based SaaS and APIs: If your product charges based on API calls, computation seconds, or data processed, Stripe’s API costs and transaction-based billing fees will quickly erode your margins. Lago handles high-volume ingestion efficiently.
2. Enterprises with Strict Data Sovereignty Requirements: If you operate in fintech, healthcare, or defense and cannot send raw, un-hashed customer usage data to third-party proprietary SaaS platforms, self-hosting Lago in your private cloud guarantees full compliance.
3. Engineering Teams Seeking to Avoid Vendor Lock-In: If you want the strategic flexibility to switch payment processors (e.g., migrating from Stripe to Adyen, or routing different regions to different local acquirers) without rewriting your billing logic or migrating subscription tables, Lago acts as an elegant, independent control plane.

Migration Assessment: Transitioning from Stripe to Lago

Migrating from Stripe Billing to Lago is a highly structured process. Because Lago decouples billing from payments, your developers do not need to migrate credit card details out of Stripe. Instead, you keep your customer cards securely vaulting inside Stripe’s PCI-compliant vaults, while moving the subscription state and metering rules to Lago.

Step 1: Mapping the State

For every customer, you will maintain a link between the Stripe Customer ID and the Lago Customer External ID.

• Stripe: Holds the credit card token (e.g., cus_H12345).
• Lago: Holds the billing schema, price plans, and usage events mapped to the identical external identifier (e.g., company_9921).

Step 2: Transitioning Active Subscriptions

When executing the migration:

1. Stop Stripe Billing: Cancel the active “Subscriptions” inside Stripe Billing without deleting the Stripe Customer records themselves.
2. Seed Lago: Recreate the matching subscription plans inside Lago. Start the billing cycle in Lago to align with the historical billing dates.
3. Redirect Event Ingestion: Reroute your application’s usage tracking pipelines to send event payloads directly to Lago’s /events API endpoint.

Step 3: Webhook Routing

Set up Lago to handle billing triggers. At the end of a billing cycle, Lago calculates the total usage, generates an invoice PDF, and calls Stripe’s Payment Intent API using the saved Stripe Customer ID. If the card charge succeeds, Stripe sends a payment success webhook back to Lago, which automatically marks the invoice as “paid.”

Final Verdict

In 2026, the trend of engineering teams decoupling their stack is accelerating. Stripe is an exceptional global payment rail, but forcing it to act as your primary database for complex, high-volume metered billing is an architectural compromise that introduces extreme vendor lock-in and excessive software fees.

By utilizing Lago as an open-source, self-hosted billing engine, you retain full ownership of your data, gain the architectural freedom to swap payment processors down the road, and instantly eliminate Stripe’s billing tax. For engineering teams who prioritize scalability, cost efficiency, and infrastructure sovereignty, Lago is the clear architectural choice.

Data verified as of 2026-07-01. Please check the official pages of Stripe and Lago for live pricing.