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Firefox Relay VS ForthWrite

Compare Firefox Relay VS ForthWrite and see what are their differences

Firefox Relay

Keep your email safe from hackers & trackers...

Rating
0 reviews
Pricing
Open source
Alternatives Is it good?
ForthWrite

Email that sounds like you, and gets measurably more like you every week. Drafts in Gmail, Outlook, and the browser. Free to start.

Rating
5.0 · 1 review
Pricing
Freemium Free trial $12 / Monthly (Standard plan)
Alternatives Is it good?
PromptBrake
Automated AI security testing for agents, chatbots, and APIs. Find prompt injection, data leaks, and unsafe behavior before launch. sponsored

Which is more popular?

Based on our record, Firefox Relay seems to be more popular. It has been mentioned 87 times since March 2021.

social mentions
87 vs 0
Email popularity
97% vs 3%
alternatives listed
210 vs 19

Base details

Website, pricing, platforms and company facts side by side.

Firefox Relay
ForthWrite
Website relay.firefox.com forthwrite.ai
Pricing
Open source
Freemium Free trial $12 / Monthly (Standard plan) Official pricing
Platforms —
Web
Company — Startup from the United States · 1 - 9 employees · 2026
Listed in
Email Fake Email Disposable Email Email Productivity +1
Email Writing Tools AI Writing Email Productivity AI Productivity Writing +4

About Firefox Relay and ForthWrite

In their own words, as submitted to SaaSHub.

Firefox Relay
ForthWrite

No description of Firefox Relay yet.

ForthWrite is an AI email writing assistant for Gmail and Outlook that learns your writing style from your real sent mail. The more you use it, the more it sounds like you. Get smart drafts in seconds, auto-draft replies before you open your inbox, and maintain your personal voice at scale. Free...

Read more about ForthWrite

Features and specs

What each product offers, as listed by its team.

Firefox Relay 5 features
ForthWrite 7 features
  • Privacy
    Firefox Relay enhances your privacy by creating unique email aliases that forward messages to your real email address. This helps protect your primary email from being exposed to tracking and spam.
  • Spam Reduction
    With email aliases, you can easily block or delete any alias that starts receiving unwanted spam, thus keeping your main inbox cleaner.
  • Ease of Use
    Firefox Relay is straightforward and user-friendly, making it simple to generate and manage email aliases directly from your web browser or account dashboard.
  • Integration with Firefox
    As a product from Mozilla, Firefox Relay integrates smoothly with the Firefox browser, providing a seamless experience for users already within the Firefox ecosystem.
  • Free Tier Available
    Firefox Relay offers a free tier, enabling users to create up to five aliases without any cost, making it accessible to everyone.

Possible disadvantages

  • Limited Free Tier
    The free tier allows only up to five email aliases, which may not be sufficient for users with high privacy needs or those wanting to use different aliases for numerous services.
  • Potential Delivery Delays
    Email forwarding services like Firefox Relay may occasionally introduce minor delays in email delivery, which could be inconvenient for some users.
  • Limited Features
    Compared to some other privacy-focused email services, Firefox Relay may offer fewer advanced features, such as custom domain support or expanded alias management tools.
  • Additional Cost for Premium
    While there is a free tier, accessing more advanced features and a higher number of aliases requires a premium subscription, which adds an ongoing cost.
  • Possible Dependence on Firefox Ecosystem
    Although it's accessible through other browsers, the best user experience and seamless integration are within the Firefox ecosystem, possibly limiting its appeal to users of other browsers.
  • Voice Matching
    Learns from your real sent mail, not templates
  • Auto-draft replies
    Replies waiting in Gmail before you open your inbox
  • Batch-drafting
    Draft replies for your entire inbox with one click
  • Works in browser
    Gmail, Outlook, and web browsers
  • BYOK support
    Claude, OpenAI, Grok, Mistral, and more
  • Prompt Lab
    Version control and A/B test your persona prompt
  • Free tier
    10 drafts per week, no credit card required

Analysis

An editorial look at what each product does well and who it suits.

Firefox Relay
ForthWrite

Overall verdict

  • Firefox Relay is a good option for individuals looking to enhance their online privacy and reduce spam. It provides an effective solution for managing email aliases and protecting personal email information without requiring significant technical knowledge.

Why this product is good

  • Firefox Relay is a service designed to enhance online privacy by allowing users to mask their real email addresses with alias emails. This helps in reducing spam, maintaining privacy when signing up for newsletters, and protecting against data breaches that may expose personal email addresses. It integrates seamlessly with the Firefox browser, offering a convenient and user-friendly way to manage alias emails and track their usage.

Recommended for

  • Those concerned about online privacy and email security.
  • Users who frequently sign up for online services and want to limit spam to their primary inbox.
  • People who want a simple solution to manage multiple email aliases without complicated setup.
  • Firefox browser users who prefer integrated privacy solutions within their browser environment.

Overall verdict

  • I don't have verified information about a product called ForthWrite (forthwrite.ai). I cannot confirm its features, quality, or reputation, so I'm unable to provide an accurate assessment of whether it's good.

Why this product is good

  • No reliable data available on this specific product in my knowledge base
  • This may be a newer product, a niche tool, or possibly a fictional/hypothetical name
  • Providing details without verified information could result in inaccurate or fabricated claims

Recommended for

  • Unable to determine without verified product information
  • Consider checking the official website, user reviews on platforms like G2 or Trustpilot, and independent tech review sites for accurate details

Videos

Walkthroughs and reviews on video.

Firefox Relay 1 video + Add
ForthWrite 0 videos + Add

Meet Firefox Relay, a privacy-first and free product that hides your real email address

No ForthWrite videos yet. You could help us improve this page by suggesting one.

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
Firefox Relay
ForthWrite
97% 97%
Email
3% 3%
87% 87%
Email Productivity
13% 13%
100% 100%
Disposable Email
0% 0%
0% 0%
Writing Tools
100% 100%

Questions & Answers

As answered by people managing Firefox Relay and ForthWrite.

Which are the primary technologies used for building your product?

ForthWrite's answer:

Next.js, React, Supabase, Anthropic Claude, OpenAI, Stripe, Vercel, Chrome Extensions API

What makes your product unique?

ForthWrite's answer:

ForthWrite learns your writing style from your actual sent mail, not a generic prompt. Every draft sounds like you wrote it because it was trained on how you actually write. It also auto-drafts replies before you open your inbox, so your email is partially handled before your day starts.

Why should a person choose your product over its competitors?

ForthWrite's answer:

Most AI email tools give you a blank box and a "write for me" button. ForthWrite builds a voice profile from your sent history and gets more accurate with every draft you edit or send. Unlike ChatGPT or Gemini, it works natively inside Gmail and Outlook with no copy-paste. Unlike Lavender, it writes the draft, not just scores it.

How would you describe the primary audience of your product?

ForthWrite's answer:

Professionals who send high volumes of relationship-critical email and cannot afford to sound generic: lawyers, financial advisors, recruiters, account executives, consultants, and founders managing their own inbox.

What's the story behind your product?

ForthWrite's answer:

Built out of frustration with AI writing tools that produce text that sounds nothing like the person sending it, and as a way to handle large amounts of daily email. The core insight was that your sent mail is the best training data you already have, and no tool was using it.

User comments

Share your experience with using Firefox Relay and ForthWrite. For example, how are they different and which one is better?

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Reviews and articles

External articles and on-site reviews we used to compare the two products.

Firefox Relay no reviews yet
ForthWrite 5.0 · 1 review

We have no reviews of Firefox Relay yet. Be the first one to post

Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

Firefox Relay 87 mentions
ForthWrite 0 mentions
  • Self-Hosting a Firefox Sync Server
    Mozilla's email-related service is https://relay.firefox.com/ which obviously needs to rely on quite a bit of Mozilla infrastructure in its default incarnation, and is probably a fair bit harder to self-host than Firefox Sync. - Source: Hacker News / over 1 year ago
  • We got hit by an alarmingly well-prepared phish spammer
    Https://relay.firefox.com/ may be a tool for that. I never used it, as I use a catch-all, but may use it in the future. - Source: Hacker News / over 1 year ago
  • Show HN: I built a tool that helps people contact you without spam
    Are you aware of Firefox Relay[0]? It seems you have extra features, but their plan is priced at 0.99€. For what I need it seems Relay is just enough. About the site, those blocks under the "Say goodbye to spam and stop cold emails."... - Source: Hacker News / almost 2 years ago

View more

Tracking ForthWrite since Jun 2026.

Alternatives to Firefox Relay and ForthWrite

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