Guerrilla Mail
- Company typePrivate
- Founded2006
- HeadquartersParis, France
- Headcount1–10
- GTM typeB2C
- OfferingSoftware
What Guerrilla Mail does
Guerrilla Mail is a Paris-headquartered, privately held web service operated by Jamit Software Limited that has provided disposable, auto-expiring email addresses since 2006. Its core product generates a temporary inbox at one of more than eleven domains (including sharklasers.com, grr.la, and guerrillamail.com) that expires after 60 minutes and requires no registration; users can receive, compose, reply, forward, and attach files up to 150MB, with HTML content sanitized and remote images blocked by default. The platform is built on a PHP/MySQL stack and is powered by Go-Guerrilla, an open-source SMTP server the company maintains on GitHub, and a public JSON API exposed at api.guerrillamail.com for third-party and developer integrations.
The business model is freemium: the base service is free and monetized indirectly through non-intrusive advertising, while a paid Custom Domain subscription ($9.99 USD/year, payable in Bitcoin or PayPal) is the only directly billed tier. Guerrilla Mail serves four primary user segments — privacy-conscious individual users, online shoppers shielding inboxes during promotions, tech-savvy early adopters, and developers consuming the API — and reaches a global audience with 15+ language localizations. The company has remained capital-efficient with 1-10 employees, no disclosed institutional funding, and an operating history of nearly two decades, with cumulative processing of more than 21 billion emails and a sustained throughput of approximately 260,000 emails per hour.
Guerrilla Mail firmographics
Firmographics- Name
- Guerrilla Mail
- Legal name
- Jamit Software Limited
- Website
- https://guerrillamail.com
- Company type
- Private
- Founded year
- 2006
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Ownership category
- akta.pro rank
Guerrilla Mail industry classification
Industry- Product category
- Disposable Email Service
- akta.pro primary industry
- Email Phishing & BEC Protection (HDADAKAB)
Keywords
Where Guerrilla Mail is headquartered
LocationHeadquarters
- HQ city
- Paris
- HQ country
- France
- HQ region
- Europe
Markets served
Guerrilla Mail business model
Business model- GTM type
- B2C
- Offering type
- Software
- Cost components
- Technology or R&D, Infrastructure, Personnel, Operations
Revenue model
- Freemium Basic Service: Free temporary email service available to all users without registration. Basic functionality includes receiving emails, composing replies, and using multiple domain addresses.
- Custom Domain Service: Users who own their own domain can use it with Guerrilla Mail for $9.99 USD/year. Email arriving to the user's domain is accessible only by them, or they can give access to everyone.
- Advertising: Testing ad placements on the website to generate revenue. Users have indicated they are acceptable with non-intrusive advertising as a way to keep the service free.
- Bitcoin Payment: Bitcoin accepted as payment method for custom domain service.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Others | Free temporary email with basic features |
| Subscription | Annual | Custom Domain Premium Service |
Go-to-market motion2 records
Distribution channels2 records
Marketing channels5 records
Guerrilla Mail product offering
Product offeringCore offering
Guerrilla Mail provides disposable temporary email addresses that auto-expire after 60 minutes, requiring no registration. Users instantly receive a random or custom email address across 11+ domains (sharklasers.com, guerrillamail.com, grr.la, etc.) to receive, view, compose, reply to, and forward emails. The service also offers a public JSON API for developers and a paid custom-domain feature that lets users route mail through their own domain for $9.99 per year.
Product overview
Guerrilla Mail is a single unified disposable temporary email service. The core product provides no-registration email addresses lasting 60 minutes, with the ability to receive, view, compose, and send emails. The service operates across multiple domains (sharklasers.com, guerrillamail.com, grr.la, etc.). Additional offerings include a Password Manager tool, Custom Domain service ($9.99/year), and a Public API for developers. The company also maintains an open-source Go-Guerrilla SMTP server project on GitHub. All core features (multi-domain use, forwarding) were made free in 2012 after an initial subscription model was discontinued.
Differentiator
Problem solved
Functional benefit
Products and services
- Guerrilla Mail (Core Service) Free, no-registration disposable temporary email service that provides random or custom email addresses lasting 60 minutes (auto-extended during active use). Users can receive, view, compose, reply, forward, and attach files (up to 150MB) across 11+ domains. HTML/JavaScript/iframes are filtered and remote images blocked by default for security.
- Guerrilla Mail API Public JSON API over HTTP that lets developers programmatically create disposable email addresses, check inboxes (up to 20 items per request), fetch email content, delete messages, and manage sessions using PHPSESSID cookies. Sample PHP client code is included in the documentation.
- Compose/Send Email Feature allowing users to compose, reply to, and forward emails from their temporary address, with CAPTCHA protection, spam filtering, and file attachments up to 150MB.
- Custom Domain Email Paid annual subscription ($9.99 USD/year, payable via Bitcoin or PayPal) that lets users point a domain they own at Guerrilla Mail so that incoming mail to that domain is accessible only to them (or optionally shared publicly).
- Password Manager Client-side password generator accessible via the Tools tab. The master passphrase is never stored, transmitted, or hashed on the server; password derivation uses SHA256 and HMAC-SHA256 with 10,000 rounds of key stretching and the domain name as salt.
- Go-Guerrilla (Open Source SMTP Server) Open-source PHP-based SMTP server published on GitHub (flashmob/go-guerrilla). Uses a single database connection reused across connections for efficiency and stores incoming email directly in the database; designed for temporary/disposable email workloads.
Quantifiable outcome
- Processed over 21 billion emails and blocked over 21 billion spam messages
- +2 more outcomes
Companies that use Guerrilla Mail
Customer profileSegments4 records
Ideal customer profiles3 records
Guerrilla Mail technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
Guerrilla Mail partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Namecheap.comminorNamecheap.com is referenced as a domain registrar option for users who want to purchase a domain to use with Guerrilla Mail's custom domain service. Users are directed to Namecheap for domain registration.
Scale indicators7 records
Recent moves2 records
Expansion highlights5 records
Guerrilla Mail competitors and assessment
Company assessmentBroad incumbents
- Proton Mail: Privacy-focused email provider offering end-to-end encrypted email with alias features. While broader in scope (full email service vs. disposable), it competes for the same privacy-conscious user base.
- Firefox Relay (Mozilla): Mozilla's email masking service that generates disposable email aliases to protect user privacy. Operates as part of Mozilla's broader privacy ecosystem and competes directly with Guerrilla Mail's privacy proposition.
- Apple Hide My Email: Built-in iCloud feature that generates unique, random email addresses forwarding to a personal inbox. Embedded in the Apple ecosystem, it competes with Guerrilla Mail for the same disposable-email use case among consumer users.
Direct peers
- Temp Mail: Direct competitor offering disposable temporary email addresses with no registration, similar to Guerrilla Mail's core product. Operates across multiple domains with comparable user experience and developer API offerings.
- Mailinator: Disposable email service offering public inboxes at shared domains. Directly competes with Guerrilla Mail in the throwaway email category with both free and enterprise-grade testing tiers.
- YOPmail: Long-standing disposable email service with similar no-registration model and multiple domain aliases. Closely comparable in functionality, audience, and freemium positioning.
- 10MinuteMail: Disposable email service built around short-lived inboxes (10-minute expiry), directly addressing the same use case as Guerrilla Mail's 60-minute expiry. Direct competitor for one-time sign-up verification.
- EmailOnDeck: Disposable email service with a comparable self-serve, no-registration experience and free-tier focus. Directly competes for the privacy-conscious individual user segment.
- MailDrop: Open-source disposable email service providing temporary public inboxes. Comparable product offering in the same horizontal privacy-tool category, including developer-focused features.
Emerging players
- SimpleLogin (Proton): Email aliasing service acquired by Proton that allows users to generate unlimited disposable email aliases forwarding to a real inbox. A more modern, security-focused alternative competing for the same privacy use case.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat4 records
Key risks6 records
Key highlights6 records
Customer concentration
Guerrilla Mail social profiles
Digital presenceGuerrilla Mail financial estimates
Financial estimateRevenue estimate
Valuation estimate
Guerrilla Mail leadership team
Management profileNumber of profiles
Guerrilla Mail funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Guerrilla Mail 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 Guerrilla Mail
What does Guerrilla Mail do?
Guerrilla Mail provides disposable temporary email addresses that auto-expire after 60 minutes, requiring no registration. Users instantly receive a random or custom email address across 11+ domains (sharklasers.com, guerrillamail.com, grr.la, etc.) to receive, view, compose, reply to, and forward emails. The service also offers a public JSON API for developers and a paid custom-domain feature that lets users route mail through their own domain for $9.99 per year.
Is Guerrilla Mail a public or private company?
Guerrilla Mail is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Guerrilla Mail founded?
Guerrilla Mail was founded in 2006. It employs 1 to 10 people.
Where is Guerrilla Mail based?
Guerrilla Mail is headquartered in Paris, France, in the Europe region.
How does Guerrilla Mail make money?
Four revenue lines are on record. Freemium Basic Service is the primary driver. The others are custom Domain Service, advertising and bitcoin Payment.
Who are Guerrilla Mail's main competitors?
Broad incumbents on record are Proton Mail, Firefox Relay (Mozilla) and Apple Hide My Email. Direct peers are Temp Mail, Mailinator, YOPmail, 10MinuteMail, EmailOnDeck and MailDrop. SimpleLogin (Proton) is listed as an emerging player.
Does Guerrilla Mail have an API?
Yes. Guerrilla Mail provides a public JSON API through HTTP for developers to create apps for Android, iPhone/iPad, Facebook, or text versions of the site. The API allows programmatic email address creation, email checking (max 20 items per request), email fetching with HTML content filtered for security, email deletion, address extension, and session management. The API URL is http://api.guerrillamail.com/ajax.php. Authentication uses PHPSESSID cookies. Sample PHP client code is provided in the documentation. Developer documentation is at www.guerrillamail.com/GuerrillaMailAPI.html.
What industry is Guerrilla Mail in?
Guerrilla Mail's product category is Disposable Email Service. Its primary akta.pro industry code is HDADAKAB, Email Phishing & BEC Protection.