What Lost Pixel does

Lost Pixel was a Vienna-based open-source visual regression testing platform founded in 2021 by Chris Kalmar and Dima Ivashchuk, both previously engineers at Adverity. The platform automated detection of unintended visual changes in web UIs by capturing screenshots of pages and components (Storybook stories, Ladle/Histoire stories, Next.js routes, or any Playwright/Cypress-captured shots) and comparing them pixel-by-pixel against baseline images using either pixelmatch or odiff diffing engines. Supporting features included anti-flakiness controls (animation disabling, network waiting, retries), configurable per-screenshot thresholds, masking, multi-browser and multi-viewport execution, parallel runs, monorepo support, and a collaborative review/approval flow surfaced through a GitHub App with Check Run integration.

Name

Lost Pixel

Legal name

Lost Pixel

Website

https://lost-pixel.com

Company type

Private

Founded year

2021

Operating status

Acquired

Headcount range

1–10 employees

Short description

Lost Pixel was an open-source visual regression testing platform that helped engineering teams detect UI changes via screenshot baseline comparisons. The Vienna-based, two-person team operated a freemium SaaS before joining Figma and sunsetting the product in April 2026.

Ownership category

akta.pro rank

Product category

Visual Regression Testing Software

akta.pro primary industry

Enterprise Reporting & Pixel-Perfect Reporting (HDAEAMAB)

Keywords

• Visual regression testing
• Frontend testing software
• Screenshot comparison tool
• UI testing automation
• Design system testing

Headquarters

HQ city

Vienna

HQ country

Austria

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

Personnel, Technology or R&D, Infrastructure, Marketing or Sales, Operations

Revenue model

1. Lost Pixel Platform SaaS Subscription: Cloud-hosted visual regression testing platform with collaboration features, automated test runs, and detailed reporting. Tiered pricing based on monthly screenshot quotas with overage charges.
2. Usage-Based Overage: When monthly screenshot limits are exceeded, customers pay per-screenshot rates that decrease at higher tiers ($0.006 at Startup, $0.005 at Business, $0.004 at Scale).
3. Open Source Free Tier: The core Lost Pixel engine is open-source and free to use indefinitely. Open source projects receive free access to the platform with 7,000 free screenshots per month.
4. Enterprise Services: Enterprise-grade support and custom solutions for large organizations requiring extensive testing coverage. Lost Pixel mentions offering solid enterprise solutions with team experience implementing visual regression tests.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

Lost Pixel provides a visual regression testing platform that captures screenshots of web pages and UI components and compares them against baseline images to detect unintended visual changes. It offers both an open-source self-hosted engine (Lost Pixel OSS) and a managed cloud platform (Lost Pixel Platform) with collaborative review workflows and GitHub Actions CI/CD integration for engineering teams.

Product overview

Lost Pixel is a visual regression testing platform with two offerings: the open-source Lost Pixel OSS engine (free) and the Lost Pixel Platform (cloud SaaS). The core product enables teams to detect unintended visual changes in UI components and pages by comparing screenshots against baselines. Lost Pixel Platform adds collaborative review workflows, automated CI/CD integration via GitHub Actions, and centralized management. The platform supports multiple testing modes (Storybook, Ladle, Histoire, Page Shots, Custom Shots) that can be composed together for holistic visual testing coverage. Pricing tiers range from Free (OSS) through Startup ($100/mo), Business ($250/mo), to Scale ($670/mo).

Differentiator

Problem solved

Functional benefit

Brands

• Lost Pixel (OSS): Open-source visual regression testing framework available for free self-hosting
• Lost Pixel Platform

Products and services

• Lost Pixel Platform Cloud-based visual regression testing platform that automates screenshot capture and comparison against baselines. Provides collaborative review workflow, automated test runs, and detailed reporting with GitHub integration. Offers holistic testing combining Storybook component tests, page tests, and E2E tests (Playwright/Cypress) in a single unified platform. Targeted at engineering teams that need managed visual testing with collaboration features.
• Lost Pixel (OSS) Open-source visual regression testing engine that can be run independently without the cloud platform. Enables teams to build their own visual testing workflow or use it completely for free. Supports testing modes including Storybook, Ladle, Histoire, page shots, and custom shots. Targeted at developers and teams wanting self-hosted visual testing.

Quantifiable outcome

• Set up visual testing in minutes via GitHub Actions integration
• +2 more outcomes

Named customers3 records

Segments4 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration7 records

AI capability2 records

Feature10 records

Partnerships

One partnership is on record.

• FigmaflagshipStrategic or Co-development PartnerLost Pixel announced on April 22, 2026 that the team is joining Figma. The company is sunsetting the Lost Pixel product to work on the next generation of developer tools at Figma. This represents a significant strategic pivot where the founders will contribute to developer tooling integrated with Figma's design platform.

Scale indicators3 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• Percy: Percy is a commercial visual regression testing platform owned by BrowserStack, directly named by Lost Pixel as a primary competitor. Both offer automated screenshot comparison integrated with CI/CD pipelines, with overlapping customer base of frontend engineering teams.
• Chromatic: Chromatic provides visual testing and review for Storybook component libraries, and is one of the three competitors (Percy, Chromatic, Applitools) explicitly named in Lost Pixel's positioning. Both serve design system teams needing UI regression detection.
• Applitools Eyes: Applitools Eyes is an AI-powered visual testing platform and one of the three named Lost Pixel competitors. Both automate visual regression detection across web UIs, with Applitools differentiating via AI-based visual comparison engines.
• BackstopJS: BackstopJS is an open-source visual regression testing tool using headless browsers and screenshot comparison. Lost Pixel explicitly targets BackstopJS users for migration and publishes comparison content against it, making it a direct open-source peer.
• Loki: Loki is an open-source visual regression testing tool for Storybook. Lost Pixel publishes dedicated comparison content vs. Loki and offers free migration assistance, positioning the two as direct open-source alternatives in the Storybook visual testing space.

Broad incumbents

• BrowserStack: BrowserStack is a broad cross-browser testing infrastructure platform that acquired Percy. While not a direct visual-regression competitor, its ownership of Percy makes it a strategic incumbent in the same category with substantially more resources.
• Sauce Labs: Sauce Labs is a large-scale cloud testing platform offering functional and visual testing for web and mobile applications. It overlaps with Lost Pixel in serving engineering teams that need automated UI verification, but as part of a much broader testing portfolio.
• Mabl: Mabl is an AI-driven test automation platform covering functional, visual, and end-to-end testing. It overlaps with Lost Pixel on the visual testing use case but targets a broader QA workflow rather than purely visual regression.
• Testim: Testim (now part of Tricentis) is an AI-based UI test automation platform. It overlaps with Lost Pixel where frontend teams automate visual verification, though its scope spans broader functional test authoring.

Others

• Storybook: Storybook is an open-source component development and testing tool. While not a direct competitor, it is a foundational adjacent platform — Lost Pixel integrates natively with Storybook for visual regression, and Chromatic (a competitor) is built by Storybook's maintainers, making Storybook ecosystem positioning strategically important for Lost Pixel.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/lostpixel_app
• GitHubgithub.com/lost-pixel/lost-pixel

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Lost Pixel