Guerrilla Mail
Guerrilla Mail is a free, no-registration disposable temporary email service founded in 2006, serving privacy-conscious internet users with anonymous, self-destructing inboxes across 11 domains and 15+ languages.
- Company typePrivate
- Founded2006
- HeadquartersBoston, United States
- Headcount1–10
- GTM typeB2C
- OfferingSoftware
What Guerrilla Mail does
Guerrilla Mail is a free, registration-free disposable email service founded in 2006 and operated by Jamit Software Limited. It provides anonymous temporary email addresses that work indefinitely with messages held in quarantine for one hour, targeting privacy-conscious individual users who want to protect their real inboxes from spam when registering on untrusted sites. The service is accessed directly via web browser or programmatically via a public JSON API, and is available across 11 domain TLDs and 15+ language interfaces, processing approximately 71,649 emails per hour and over 21 billion emails cumulatively since inception.
Guerrilla Mail firmographics
Firmographics- Name
- Guerrilla Mail
- Legal name
- Jamit Software Limited
- Website
- https://grr.la
- Company type
- Private
- Founded year
- 2006
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Guerrilla Mail is a free, no-registration disposable temporary email service founded in 2006, serving privacy-conscious internet users with anonymous, self-destructing inboxes across 11 domains and 15+ languages.
- Ownership category
- akta.pro rank
Guerrilla Mail industry classification
Industry- Product category
- Disposable Email Service
- NAICS
- Software Publishers (5132)
- SIC
- Services-Prepackaged Software (7372)
- akta.pro primary industry
- Email Authentication & Domain Protection (DMARC/SPF/DKIM) (HDADAKAC)
Keywords
Where Guerrilla Mail is headquartered
LocationHeadquarters
- HQ city
- Boston
- HQ country
- United States
- HQ region
- North America
Markets served
Guerrilla Mail business model
Business model- GTM type
- B2C
- Offering type
- Software
- Cost components
- Infrastructure, Technology or R&D, Operations, Personnel, Marketing or Sales
Revenue model
- Custom Domain Premium Service: Users who own a domain can use it with Guerrilla Mail for $9.99 USD/year. Email arriving at their custom domain is accessible only by them, or can be made accessible to everyone.
- Display Advertising: Guerrilla Mail tested ad placements on the site to generate revenue. Ads were kept minimal and non-intrusive to balance user experience with monetization needs.
- Merchandise (T-Shirts): Guerrilla Mail branded merchandise sold through CafePress and later Teespring to support the service.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Pay-as-you-go | Free basic tier - temporary email addresses with no registration required |
| Subscription | Annual | Premium domain service - use your own domain |
Go-to-market motion1 record
Distribution channels2 records
Marketing channels5 records
Guerrilla Mail product offering
Product offeringCore offering
Guerrilla Mail provides disposable, self-destructing temporary email addresses that require no registration and are available instantly via the web. Users receive a random inbox on one of 11+ domains (e.g., sharklasers.com, guerrillamail.com, grr.la) and can receive emails for up to one hour. An optional premium tier ($9.99/year, payable in Bitcoin or PayPal) lets users attach their own custom domain to Guerrilla Mail's receiving infrastructure. The platform also exposes a public JSON API for developers and includes ancillary tools such as a client-side password manager and email-sending capability.
Product overview
Guerrilla Mail is a single unified product offering disposable temporary email addresses. The core service provides anonymous, self-destructing email addresses lasting 60 minutes with no registration required. The product portfolio includes the main Guerrilla Mail web interface, a Password Manager tool, a Bitcoin sending feature, and the underlying Go-Guerrilla open-source SMTP server. Multiple email domains are supported including sharklasers.com, guerrillamail.com, guerrillamail.info, guerrillamail.net, guerrillamail.org, guerrillamail.biz, guerrillamail.de, guerrillamailblock.com, pokemail.net, spam4.me, and grr.la. A premium subscription adds email forwarding and custom domain support.
Differentiator
Problem solved
Functional benefit
Products and services
- Guerrilla Mail Disposable Email Service Disposable temporary email address service for individual internet users. Users visit the site and instantly receive a random email address on one of 11+ domains; incoming emails are retained for 60 minutes. Designed to keep real inboxes free of spam when signing up for unfamiliar sites.
- Custom Domain Premium Service Paid annual subscription ($9.99/year, payable in Bitcoin or PayPal) that lets users point their own domain at Guerrilla Mail so email arriving at that domain is accessible only by them (or optionally shared). Originally introduced at $24/year with broader features; later narrowed to custom-domain use and made free for remaining features.
- Client-Side Password Manager Free zero-knowledge browser-based password generator that derives a unique password per website from a master passphrase. All key derivation runs client-side in JavaScript; nothing is sent to or stored on the server. Aimed at users who want a lightweight password tool alongside Guerrilla Mail's privacy suite.
- Guerrilla Mail JSON API Public HTTP/JSON API for developers to create, query, fetch, and delete temporary email addresses and inbox contents programmatically. Used by third-party apps, browser extensions, mobile apps, and automated test harnesses. Free with no sales process.
- Bitcoin Sending Feature Feature that lets users send bitcoins to a recipient via email without needing the recipient's bitcoin address. The sender fills in To/From fields and deposits bitcoin; the recipient receives an email with withdrawal instructions. Transactions are tracked and notifications are sent.
Quantifiable outcome
- 21,187,008,625+ emails processed, blocking 21,099,337,560+ spam messages
- +1 more outcomes
Companies that use Guerrilla Mail
Customer profileSegments1 record
Ideal customer profiles2 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.
- Go-Guerrilla (Flashmob)coreGo-Guerrilla is the open-source PHP SMTP server project that powers Guerrilla Mail. Released under open source license, it enables other temporary email service providers to use the same efficient email processing architecture. Guerrilla Mail uses this custom-built daemon for receiving, processing, and storing emails with high efficiency.
Scale indicators4 records
Recent moves6 records
Expansion highlights5 records
Guerrilla Mail competitors and assessment
Company assessmentDirect peers
- ThrowAwayMail: Disposable temporary email service with auto-expiring addresses. Direct competitor in same niche, comparable registration-free UX and consumer/privacy user segment.
- Mailinator: Disposable email service offering public inboxes at mailinator.com. Comparable in core product (throwaway addresses) and developer-grade API; Mailinator has stronger enterprise/test-email positioning while Guerrilla Mail leans consumer/privacy.
- YOPmail: Disposable email service with persistent inboxes (no automatic deletion), similar to Guerrilla Mail's 'addresses work indefinitely' feature. Direct competitor in the same disposable email category with comparable no-registration UX.
- 10MinuteMail: Direct competitor offering time-limited disposable email addresses (10-minute expiry). Comparable to Guerrilla Mail in core product, target audience (privacy-conscious users), and PLG/self-serve distribution model.
- Dispostable: Simple disposable email service offering throwaway addresses with no registration. Comparable to Guerrilla Mail in core functionality and minimalist PLG distribution model.
- EmailOnDeck: Disposable temporary email service targeting privacy-conscious users. Directly comparable to Guerrilla Mail in functionality (free disposable addresses, registration-free) and target audience.
- TempMail: Disposable temporary email service with similar registration-free flow, multi-language support, and developer API. Directly competes with Guerrilla Mail in the privacy/anti-spam niche with comparable global reach.
Broad incumbents
- ProtonMail: Privacy-focused email provider offering end-to-end encrypted persistent email. Broader scope than Guerrilla Mail (full email hosting vs disposable), but shares the privacy-first target audience and overlaps in addressing user email privacy concerns.
- Firefox Relay: Mozilla's email aliasing service that creates forwarding aliases to protect real email addresses. Broader incumbent with similar privacy-protection value proposition, though focused on persistent aliases rather than disposable inboxes.
- Apple Hide My Email: Apple's email aliasing service integrated with iCloud+, generating unique random forwarding addresses. Comparable privacy value proposition for consumers, but backed by Apple ecosystem rather than operating as standalone disposable service.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat6 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, self-destructing temporary email addresses that require no registration and are available instantly via the web. Users receive a random inbox on one of 11+ domains (e.g., sharklasers.com, guerrillamail.com, grr.la) and can receive emails for up to one hour. An optional premium tier ($9.99/year, payable in Bitcoin or PayPal) lets users attach their own custom domain to Guerrilla Mail's receiving infrastructure. The platform also exposes a public JSON API for developers and includes ancillary tools such as a client-side password manager and email-sending capability.
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 Boston, United States, in the North America region.
How does Guerrilla Mail make money?
Three revenue lines are on record. Custom Domain Premium Service is the primary driver. The others are display Advertising and merchandise (T-Shirts).
Who are Guerrilla Mail's main competitors?
Direct peers on record are ThrowAwayMail, Mailinator, YOPmail, 10MinuteMail, Dispostable, EmailOnDeck and TempMail. Broad incumbents are ProtonMail, Firefox Relay and Apple Hide My Email.
Does Guerrilla Mail have an API?
Yes. Public JSON API available at http://api.guerrillamail.com/ajax.php. Allows developers to create applications for managing temporary email addresses, checking inbox, fetching emails, sending replies, and managing email addresses. Version 1.0 released April 19, 2011. Supports functions including get_email_address, set_email_user, check_email, get_email_list, fetch_email, forget_me, del_email, and extend. Requires passing IP address and user-agent parameters with each request. Session management via PHPSESSID and SUBSCR cookies. 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 HDADAKAC, Email Authentication & Domain Protection (DMARC/SPF/DKIM). Its NAICS code is 5132 and its SIC code is 7372.