Responsively App
Responsively App is a free, open-source Chromium-based desktop browser that lets web developers simultaneously preview, interact with, and screenshot responsive websites across multiple device viewports, monetized via community sponsorships and advertising.
- Company typePrivate
- Founded2020
- HeadquartersCoimbatore, India
- Headcount1–10
- GTM typeB2C
- OfferingSoftware
What Responsively App does
Responsively App is a free, open-source desktop browser application built on Chromium that enables web developers to simultaneously preview and interact with a website across multiple device viewports. The core product eliminates the manual resizing workflow of traditional browser devtools by rendering multiple device profiles side-by-side, mirroring clicks, scrolls, and navigation in real-time across all viewports, and providing a unified inspector and one-click batch screenshot capture. Notable technical components include a custom Screenshot v2 mechanism that achieves 3-5x faster full-page capture by adjusting webview height rather than iteratively stitching, an extensive library of pre-configured device profiles, customizable Preview Suits and a Device Manager, and a one-click integration with BrowserStack for testing on 20,000+ real devices. The product is distributed as a single downloadable application for Windows, macOS (Apple Silicon and Intel), and Linux (x64 and arm64).
The business model is community-led and product-led rather than commercial. The tool is offered entirely free of charge with no account requirement and no paid tier; revenue is generated through GitHub Sponsors, Open Collective donations, and Carbon display advertising. The project is maintained under the responsively-org GitHub organization by a community of 150+ contributors led by founder Manoj Vivek, with 25,010 GitHub stars and 150k+ total downloads cited as scale indicators. The company accepted support from the GitHub Accelerator in April 2023 and announced a strategic partnership with BrowserStack in October 2023 to expand into live real-device testing. The named gold sponsor is TestMu AI; no institutional venture or private equity backing is evidenced in the source material, and headcount is reported as 1-10.
Responsively App firmographics
Firmographics- Name
- Responsively App
- Legal name
- Responsively App
- Website
- https://responsively.app
- Company type
- Private
- Founded year
- 2020
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Responsively App is a free, open-source Chromium-based desktop browser that lets web developers simultaneously preview, interact with, and screenshot responsive websites across multiple device viewports, monetized via community sponsorships and advertising.
- Ownership category
- akta.pro rank
Where Responsively App is headquartered
LocationHeadquarters
- HQ city
- Coimbatore
- HQ country
- India
- HQ region
- Asia
Markets served
Responsively App business model
Business model- GTM type
- B2C
- Offering type
- Software
- Cost components
- Technology or R&D, Personnel, Infrastructure, Operations, Marketing or Sales
Revenue model
- Open Source Donations/Sponsorships: Free and open-source project supported by individual and business sponsors through GitHub Sponsors and Open Collective platforms. Both recurring and one-time sponsorships accepted, with preference for recurring to cover ongoing costs.
- Business Sponsorships: Companies can sponsor to enhance brand reputation in the open-source community, gain visibility with developer talent, and build relationships with developers who share their values.
- Advertising (Carbon Ads): Display advertising via Carbon ads network on the website as a supplementary revenue stream.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Pay-as-you-go | Free - Complete access to all features |
Go-to-market motion2 records
Distribution channels2 records
Marketing channels5 records
Responsively App product offering
Product offeringCore offering
Responsively App is a free, open-source Chromium-based desktop browser built for web developers that simultaneously previews and tests responsive web designs across multiple device viewports side-by-side. It delivers mirrored click/scroll/navigation interactions, a unified cross-device element inspector, one-click full-page batch screenshots, customizable device profiles and suites, and an integrated BrowserStack real-device testing capability. The product is downloadable for macOS, Windows, and Linux with no account or payment required.
Product overview
Responsively App is a single, unified product—a specialized web developer's browser that provides all-in-one responsive design testing. The core Responsively App includes built-in features: Device Suites for simultaneous multi-device previews, the Unified Inspector for cross-device element inspection, One Click Screenshots for batch capture, Preview Suits for saved device configurations, Device Manager for custom device profiles, Developer Tools integration, and color vision accessibility simulation. BrowserStack Real Device Testing is an add-on integration enabling live device sessions on physical hardware. All functionality is delivered within one downloadable desktop application available for macOS, Windows, and Linux—no separate modules to purchase.
Differentiator
Problem solved
Functional benefit
Products and services
- Responsively App A free, open-source Chromium-based desktop browser that previews websites simultaneously across multiple device viewports with mirrored interactions, unified element inspection, batch screenshots, and customizable device profiles, targeted at individual web developers.
Companies that use Responsively App
Customer profileNamed customers5 records
Segments1 record
Ideal customer profiles2 records
Responsively App technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration1 record
Feature9 records
Responsively App partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- BrowserStackcorePartnership integrating BrowserStack's real device testing capabilities directly into Responsively App. Users can test on 20,000+ real devices across 19 global data centers with one click from within the Responsively App interface. BrowserStack offers Responsively App users 3x more trial minutes for their first session.
Scale indicators3 records
Recent moves5 records
Expansion highlights4 records
Responsively App competitors and assessment
Company assessmentDirect peers
- Blisk: Blisk is a Chromium-based developer browser for testing web apps across multiple devices and browsers simultaneously. Competes directly with Responsively App for the same web-developer persona with overlapping features around device emulation and sync.
- Polypane: Polypane is a purpose-built browser for web developers and designers that previews sites across multiple device viewports simultaneously. It directly competes with Responsively App in the multi-device responsive testing category with overlapping core features (device profiles, mirrored interactions, unified inspection, screenshots).
- Sizzy: Sizzy is a developer-focused browser for responsive design testing that previews sites on multiple devices simultaneously with synchronized clicks, device switching, and screenshot capture. Closely comparable to Responsively App's core offering for the same web-developer persona.
Broad incumbents
- BrowserStack: BrowserStack is an enterprise cross-browser and real-device cloud testing platform. Already a strategic integration partner of Responsively App, it competes on the same downstream use case (responsive/cross-device web validation) but from a higher-priced enterprise SaaS motion with broader portfolio.
- Sauce Labs: Sauce Labs is an enterprise cloud testing platform for web and mobile applications providing cross-browser testing on real devices and emulators. Competes in the broader responsive/cross-device testing category that Responsively App targets.
- LambdaTest: LambdaTest is a cloud-based cross-browser and device testing platform for web and mobile apps. Overlaps with Responsively App on the responsive/cross-device validation use case, but addresses it through enterprise cloud infrastructure rather than a local desktop browser.
- Chrome DevTools: Chrome DevTools is Google Chrome's built-in developer tools suite, including device mode for responsive design testing. Acts as the default free reference tool that Responsively App competes with, as DevTools' device emulation, layout debugging, and accessibility tooling continuously raise the baseline.
- Firefox Developer Tools: Firefox Developer Tools is Mozilla's built-in developer tools suite including responsive design mode for emulating different device viewports. Adjacent / indirect competitor to Responsively App - also free and built-in, covering a subset of multi-device testing workflows.
Others
- Cypress: Cypress is a developer-first end-to-end testing framework for web applications. Not a direct multi-device visual tester like Responsively App, but targets the same developer persona and overlaps with the broader web-testing workflow Responsively App is embedded in.
Emerging players
- LT Browser by LambdaTest: LT Browser is LambdaTest's dedicated desktop responsive-testing browser for 50+ device viewports. Emerging direct competitor with similar positioning to Responsively App but with LambdaTest's cloud-testing parent company backing and integration into a broader testing platform.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat3 records
Key risks5 records
Key highlights6 records
Customer concentration
Responsively App social profiles
Digital presenceResponsively App financial estimates
Financial estimateRevenue estimate
Valuation estimate
Responsively App leadership team
Management profileNumber of profiles
Profiles1 record
Responsively App funding detail
Funding detailFunding overview
Funding rounds1 record
Investors1 record
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Responsively App M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Responsively App
What does Responsively App do?
Responsively App is a free, open-source Chromium-based desktop browser built for web developers that simultaneously previews and tests responsive web designs across multiple device viewports side-by-side. It delivers mirrored click/scroll/navigation interactions, a unified cross-device element inspector, one-click full-page batch screenshots, customizable device profiles and suites, and an integrated BrowserStack real-device testing capability. The product is downloadable for macOS, Windows, and Linux with no account or payment required.
Is Responsively App a public or private company?
Responsively App is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Responsively App founded?
Responsively App was founded in 2020. It employs 1 to 10 people.
Where is Responsively App based?
Responsively App is headquartered in Coimbatore, India, in the Asia region.
How does Responsively App make money?
Three revenue lines are on record. Open Source Donations/Sponsorships are the primary driver. The others are business Sponsorships and advertising (Carbon Ads).
Who are Responsively App's main competitors?
Direct peers on record are Blisk, Polypane and Sizzy. Broad incumbents are BrowserStack, Sauce Labs, LambdaTest, Chrome DevTools and Firefox Developer Tools. Cypress is listed as an others. LT Browser by LambdaTest is listed as an emerging player.
Does Responsively App have an API?
No public API is recorded for Responsively App.