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REAL PRODUCTS. PUBLIC SOURCES.

Explore revenue-backed businesses.

Public income figures, clear source context, and business case studies for independent founders.

Read the business case studies →How we source the data ↗
Real projects86
Source-linked business profiles
Revenue disclosures86
Original metric & reporting context
Open-source projects5
Public code, different business models
Repository signals3
GitHub snapshots, not growth claims
All projects 86Public revenueOpen source
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15 projects matching “API”

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Template-driven image and video API

≈ $50,000MRR · USDHistorical milestone: July 2023
Researched profile Company disclosure
Subscription

Browserless ↗

Developer tools

Managed browser infrastructure for automation, data extraction and browser-based applications.

≈ $3,500,000ARR · Unspecified $Approximate ARR stated during the interview published March 5, 2026; recording and measurement dates unspecified
Researched profile Founder disclosure in interview
Usage-based cloud subscriptions + enterprise licensing

EmailEngine ↗

Developer tools

A self-hosted gateway that exposes mailbox access through a common REST API.

≈ $13,000MRR · Unspecified $Current MRR stated in the interview published January 24, 2026; measurement date unspecified
Researched profile Founder disclosure in interview
Self-hosted software subscription + enterprise license

NinjaPear ↗

Developer tools

B2B research data for enrichment and prospecting workflows.

> $15,000Monthly revenue · Unspecified $Gross revenue for 'last month' in the July 7, 2026 interview; the financial month and cutoff are not explicitly dated
Researched profile Founder disclosure in interview
Credit-based API access through subscriptions and pay-as-you-go purchases

Privacy-oriented web analytics with a hosted dashboard, APIs and agency options.

≈ $14,300MRR · Unspecified $2025 year-end recap snapshot
Researched profile Founder disclosure
Subscription

Postiz ↗

Marketing tools

A social publishing service with hosted subscriptions and interfaces for automated workflows.

≈ $2,200,000ARR · Unspecified $Annual recurring revenue disclosed on September 7, 2026
Researched profile Founder disclosure
Subscription SaaS

PostPeer ↗

Developer tools

A unified API for connecting social accounts, scheduling content and checking publication results.

≈ $2,400MRR · Unspecified $Subscription MRR reported in a July 28, 2026 interview; measurement day unspecified
Researched profile Founder disclosure in interview
Usage-based subscriptions + one-time credit packs

Puff Zero ↗

Health & Fitness

Record vaping counts, personal check-ins and self-selected goals in a mobile diary.

$13MRR · Unspecified $Product MRR snapshot extracted from the founder's RevenueCat account on July 19, 2026. The article separately specifies June 21–July 19 for trailing activity and collected portfolio receipts.
Researched profile Founder disclosure
Freemium app + weekly, monthly or annual subscriptions

Ring Tonic ↗

Marketing tools

Call attribution and reporting software connected to the customer's own phone-service account.

≈ $5,400MRR · Unspecified $Current Ring Tonic run rate described in the February 24, 2026 founder interview; exact financial cutoff unstated.
Researched profile Founder disclosure
Subscription SaaS + separately billed external services

ScrapingBee ↗

Developer tools

A web-data API that manages rendering and proxy infrastructure.

$1,000,000ARR · Unspecified $Historical ARR milestone reached November 2021
Researched profile Founder disclosure
API subscription

ScreenshotOne ↗

Developer tools

A screenshot API that handles browser rendering and capture options.

$200,000ARR · Unspecified $Historical ARR milestone reported April 2025
Researched profile Founder disclosure
API subscription + usage

SEO Utils ↗

Marketing tools

Desktop SEO software combining keyword, ranking and reporting workflows with customer-supplied data services.

≈ $10,400Monthly revenue · Unspecified $Approximate current monthly revenue stated in the February 2026 founder interview
Researched profile Founder disclosure
Desktop software licenses + optional add-ons

Sleek ↗

Design

AI-assisted mobile screen design with editable output for Figma and application development.

≈ $10,000MRR · Unspecified $MRR disclosed in the January 13, 2026 interview; exact observation date unspecified
Researched profile Founder disclosure in interview
Credit-based monthly and annual subscriptions

SocialKit ↗

Developer tools

An API that turns supported social media URLs into structured content and metrics.

≈ $2,800MRR · Unspecified $Subscription MRR reported in a July 28, 2026 interview; measurement day unspecified
Researched profile Founder disclosure in interview
Usage-based subscriptions + one-time credit packs

Zernio ↗

Developer tools

A unified API for connecting accounts and adding social publishing, messaging and related marketing functions.

> $1,000,000ARR · Unspecified $Founder said the product crossed 1M ARR about a month before the interview published April 30, 2026; exact milestone date unspecified
Researched profile Founder disclosure in interview
Usage-based connected-account billing + metered services

Figures are source disclosures, not audited by MRRTrace. Revenue is not profit. Revenue sorting uses the selected metric and currency (default: USD MRR); other metrics follow alphabetically. GitHub stars measure repository interest, not business success.