What is App Stack Builder?

App Stack Builder is a free AI-powered tool that helps founders and developers choose the right tech stack for their projects based on budget, app type, team size, and skill level.

What is the best tech stack for SaaS in 2026?

The best tech stack for SaaS in 2026 typically includes Next.js 16 for frontend, Supabase for database and auth, Vercel for hosting, Stripe for payments, and PostHog for analytics. App Stack Builder can generate a personalized recommendation based on your specific budget and requirements.

Is App Stack Builder free to use?

Yes, App Stack Builder is completely free to use. You can generate unlimited tech stack recommendations without any cost.

What types of apps can I build with the recommended stacks?

App Stack Builder supports various app types including SaaS applications, web apps, mobile apps, e-commerce stores, internal tools, and AI/ML products.

How much does a SaaS tech stack cost per month?

A modern SaaS tech stack can cost anywhere from $0-50/month for bootstrapped startups using free tiers, $100-300/month for growth-stage startups, to $500+/month for enterprise-ready infrastructure. App Stack Builder helps you find the best tools within your specific budget.

What is the best tech stack for solo founders?

For solo founders, we recommend Next.js + Vercel (free), Supabase (free tier), Supabase Auth (free), Stripe (pay as you go), and Plausible or PostHog for analytics. This stack can run your entire SaaS for under $50/month.

Can I export my tech stack recommendations?

Yes, you can export your tech stack recommendations as a PDF document or copy them to your clipboard. You can also share a link to your stack with others.

Usage-Based Billing & Metering

The 3 Best Lago Alternatives in 2026

Name: App Stack Builder
Availability: InStock

Looking for an alternative to Lago? Below we compare the best usage-based billing & metering alternatives by pricing, free tiers, and what each is best for — so you can pick the right fit for your budget and stack.

Why look for a Lago alternative?

Lago is a solid usage-based billing & metering choice, but it isn't the right fit for everyone. The most common reasons teams evaluate alternatives:

−Self-hosting billing means you own its uptime
−Advanced features (RBAC, SSO) are paid add-ons
−Cloud pricing beyond Starter is mostly quote-based

Lago vs Alternatives — Quick Comparison

Tool	Pricing	Free tier	Rating	Best for
LagoYou searched	Free · paid from $599/mo		4.6	Usage-Based Billing & Metering — billing, usage-based
1.Flexprice	Free · paid from $500/mo		4.5	Usage-Based Billing & Metering — billing, usage-based
2.Metronome	Usage-based	—	4.6	Usage-Based Billing & Metering — billing, usage-based
3.Orb	Usage-based	—	4.6	Usage-Based Billing & Metering — billing, usage-based

Top Lago Alternatives, Explained

1. Flexprice

Free tier4.5· Free · paid from $500/mo

Flexprice is a developer-first, AGPL-licensed billing platform (6K+ GitHub stars) aimed at AI and API companies. It meters events, manages wallets and prepaid credits, supports usage, credit, seat and hybrid pricing, and generates invoices. Unusually for this category it publishes prices: Free covers 100K events a month (up to $100K cumulative billing), Build is $500/month for 1M events and Scale $1,000/month for 5M, with 20% off yearly. The open-source edition is free to self-host, and Mission Critical adds VPC or on-premise deployment.

Open source with a free hosted tier
Published prices, which is rare in billing
Built for credit and wallet models common in AI products

Flexprice pricing & review Lago vs Flexprice

2. Metronome

4.6· Usage-based

Metronome meters usage in real time and turns it into invoices for usage, seat, subscription and hybrid pricing, including enterprise contracts with commits, credits and overrides. It is built for very high event volume, which is why AI and infrastructure companies use it. Stripe completed its roughly $1B acquisition in January 2026 and Metronome still sells as its own product. The Startup plan is 0.8% of billed volume plus $0.04 per 1,000 ingested events. Custom adds Salesforce, NetSuite and cloud-marketplace invoicing, warehouse exports and enhanced SLAs.

Handles very high event volume
Enterprise contracts with commits and credits
Tight Stripe integration now that Stripe owns it

Metronome pricing & review Lago vs Metronome

3. Orb

4.6· Usage-based

Orb ingests raw usage events and lets finance and engineering define billable metrics in SQL, then runs pricing experiments, invoicing, credits and revenue reporting on top, with warehouse sync and NetSuite and Salesforce integrations on higher tiers. It is used by AI and infrastructure companies with complex contracts. Adyen agreed to acquire Orb for $335M in June 2026 (closed July 2026) and keeps it multi-PSP. Pricing is sales-led across Core, Advanced and Enterprise, charged on billings plus events, with a platform fee on Advanced and Enterprise.

SQL-defined metrics are flexible and auditable
Simulate pricing changes on historical usage
Strong finance and warehouse integrations

Orb pricing & review Lago vs Orb

Frequently Asked Questions

What are the best alternatives to Lago in 2026?⌄

The best Lago alternatives in 2026 are Flexprice, Metronome, Orb. Each is a usage-based billing & metering option you can compare on pricing, free tiers, and features in the table above.

Is there a free alternative to Lago?⌄

Yes — Flexprice offer free tiers, making them strong free Lago alternatives for bootstrapped startups.

Why look for a Lago alternative?⌄

A common reason teams switch is self-hosting billing means you own its uptime. Beyond that, people compare usage-based billing & metering tools on pricing, specific feature gaps, ease of use, and whether an open-source or free-tier option exists — so they can pick the best fit for their stack and budget.

What is the cheapest Lago alternative?⌄

Flexprice is among the most affordable Lago alternatives — free · paid from $500/mo. Check the comparison table above for the full pricing breakdown.

Which Lago alternative is rated highest?⌄

Metronome is the highest-rated Lago alternative in our catalog at 4.6 out of 5, making it a strong pick if you want a well-reviewed option.