Software Alternatives, Accelerators & Startups

ipstack VS ForthWrite

Compare ipstack VS ForthWrite and see what are their differences

Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

ipstack logo ipstack

ipstack is a free, real-time IP address to location JSON API and database service supporting IPv4 and IPv6 lookup.

ForthWrite logo ForthWrite

Email that sounds like you, and gets measurably more like you every week. Drafts in Gmail, Outlook, and the browser. Free to start.
Visit Website
  • ipstack Landing page
    Landing page //
    2023-07-13
  • ForthWrite Landing Page
    Landing Page //
    2026-06-19
  • ForthWrite Dashboard
    Dashboard //
    2026-06-19
  • ForthWrite In Gmail
    In Gmail //
    2026-06-19
  • ForthWrite Pricing
    Pricing //
    2026-06-19

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 to start, no credit card required. Works inside Gmail and Outlook on the web.

How it works

ForthWrite captures your tone, sentence rhythm, and sign-offs from your actual sent emails, then uses that profile to generate drafts that match how you write, not a generic AI voice. Every draft you edit or send improves the model over time.

Key features

  • Auto-draft: replies waiting in Gmail before you open your inbox
  • Voice matching from your real sent mail, not templates
  • Recipient-aware drafts that adapt to who you are emailing
  • Prompt Lab for version-controlling and A/B testing your persona prompt
  • BYOK support: bring your own API key for Claude, OpenAI, Grok, Mistral, and more
  • Works in Gmail and Outlook on the web, plus a standalone browser widget
  • Training data export and full data portability

Who uses it

Professionals who send high volumes of relationship-critical email: lawyers, financial advisors, recruiters, account executives, founders, and anyone who wants their inbox handled without sounding like a chatbot wrote it.

Pricing

Free tier includes 10 drafts per week with no credit card required. Paid plans start at $12/month and include unlimited drafts, custom persona prompts, and auto-draft.

ipstack

$ Details
-
Platforms
-
Release Date
-

ForthWrite

$ Details
freemium $12.0 / Monthly (Standard plan)
Platforms
Web
Release Date
2026 June
Startup details
Country
United States
State
California
City
San Diego
Founder(s)
Curtis Boortz
Employees
1 - 9

ipstack features and specs

  • Ease of Use
    ipstack offers a user-friendly interface and extensive documentation that makes it easy for developers to integrate its API into their applications.
  • Comprehensive Data
    Provides detailed geolocation data, including continent, country, region, city, latitude, longitude, and more, which is beneficial for various applications.
  • Reliable Performance
    ipstack is known for its reliable uptime and fast response times, ensuring consistent performance for applications relying on its services.
  • Scalability
    The service supports a high number of API requests, making it suitable for both small-scale applications and large-scale enterprise solutions.
  • Security Features
    Offers a secure HTTPS connection to ensure that data is transmitted securely, protecting sensitive information from interception.

Possible disadvantages of ipstack

  • Cost
    While ipstack offers a free tier, its premium plans can be costly for small businesses or individual developers with limited budgets.
  • Data Accuracy
    The accuracy of the geolocation data can sometimes be limited, particularly for mobile IP addresses and VPN users.
  • Privacy Concerns
    The service involves processing IP addresses, which could raise privacy concerns for users who are sensitive about sharing their geolocation data.
  • Limited Free Plan
    The free tier comes with limitations on the number of API requests and available features, which may not be sufficient for advanced or high-demand applications.
  • Complexity of Advanced Features
    Implementing advanced features might require additional effort and technical expertise, which could be challenging for less experienced developers.

ForthWrite features and specs

  • 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 of ipstack

Overall verdict

  • Yes, ipstack is generally considered a good tool for those needing IP geolocation services due to its feature-rich offerings and reliability. However, the effectiveness can vary based on specific needs and use cases.

Why this product is good

  • ipstack is a popular IP geolocation service known for providing detailed information about the geographic location of IP addresses. It offers a reliable API, extensive documentation, and a range of features such as time zone and currency information, ASN data, and security modules. Many users appreciate its ease of integration and the accuracy of the data provided.

Recommended for

  • Developers looking to integrate IP geolocation functionality into their applications
  • Businesses needing to personalize user experiences based on location data
  • Security teams seeking to analyze and mitigate potential threats using geographic data
  • Marketers interested in targeting audiences by region or location

ipstack videos

ipstack in recon ng

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to ipstack and ForthWrite)
IP Data
100 100%
0% 0
Writing Tools
0 0%
100% 100
Geolocation
100 100%
0% 0
Email
0 0%
100% 100

Questions & Answers

As answered by people managing ipstack 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 ipstack and ForthWrite. For example, how are they different and which one is better?
Log in or Post with

Reviews

These are some of the external sources and on-site user reviews we've used to compare ipstack and ForthWrite

ipstack Reviews

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

ForthWrite Reviews

  1. curtisboortz
    ยท Founder at ForthWrite ยท
    I built ForthWrite to fix generic AI email, and I still use it every day

    I built ForthWrite because I kept sending emails that sounded like they came from the same generic AI as everyone else. After launching it, I still use it for my own inbox every day, which is about the most honest endorsement I can give.

    The Chrome extension lives inside Gmail and Outlook on the web. Open a thread, hit Alt+Shift+D, and a draft comes back in your voice, not a template. The free tier is real: 10 drafts per week, no API key, no credit card. Voice matching is included on free, because that is the point.

    What keeps it useful compared to Gemini or a chat tab: it learns from what you actually send. Every edit you make before hitting send becomes a signal. Over time the drafts drift closer to how you really write, and the dashboard shows the improvement curve so you can see it happening.

    The web compose surface lets you draft from forthwrite.ai without installing anything, useful for people who want to try before committing to the extension.

    Standard adds recipient-aware and intent-aware drafting plus AI coaching. Pro adds auto-draft (replies waiting when you open Gmail), batch replies, and Prompt Lab for version-controlling your prompts. Teams adds a shared persona and seat-level analytics.

    ForthWrite is not for everyone. If you just need quick replies and tone does not matter, Gemini is free and already in your inbox. ForthWrite is for people where tone does matter: client communication, relationship-driven threads, external correspondence where sounding off costs something real.

    Disclosure: I am the founder and use it daily. Happy to answer questions in the comments.

    ๐Ÿ Competitors: Jace.ai, Fyxer, Mailmeteor
    ๐Ÿ‘ Pros:    Drafts land inside gmail and outlook; no copy-pasting from a chat window|Voice matching is on the free tier, not paywalled behind paid plans|No api key, no credit card to start; free tier runs on a server-side proxy|Learns from every edit you make before sending; drafts improve over time|Full keyboard flow: alt+shift+d to draft in any thread, no mouse required|Byok on paid plans, 9 providers supported, keys encrypted at rest|Web compose at forthwrite.ai works without installing the extension at all
    ๐Ÿ‘Ž Cons:    10 free drafts/week is enough to evaluate, not enough for a heavy inbox|Auto-draft, batch replies, and prompt lab all require the pro tier|Early-stage product; fewer third-party integrations than mature inbox tools|No mobile app: the extension and add-in are desktop-only (chrome on web, or the outlook desktop add-in)

Social recommendations and mentions

Based on our record, ipstack seems to be more popular. It has been mentiond 36 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

ipstack mentions (36)

  • Overcoming Geo-Blocked Features: A Senior Architect's Strategy for Rapid QA Testing
    Services like IPStack or MaxMind provide APIs to programmatically detect and manipulate location data. Integrating these into test scripts allows dynamic region simulation:. - Source: dev.to / 5 months ago
  • Building a Next-Gen AI Fraud Detection System: A Python & LangChain Tutorial
    First, ensure you have your Python environment ready. You will need an API key from IPStack (specifically one that supports the security module) and an OpenAI API key (or any LLM provider supported by LangChain). - Source: dev.to / 8 months ago
  • How Enterprises Benefit from Global IP Coverage API Platforms
    ๐Ÿ‘‰ Explore the most Accurate IP geolocation service at: https://ipstack.com/. - Source: dev.to / 8 months ago
  • Exploring the API Market with an IP Address Location API
    APIs from reputable providers such as ipstack.com offer robust performance, extensive documentation, and real-time accuracy, making them a preferred choice for developers. - Source: dev.to / 9 months ago
  • What is the best Geolocation API in 2025?
    IPstack โ€” Robust API with scalable infrastructure. - Source: dev.to / about 1 year ago
View more

ForthWrite mentions (0)

We have not tracked any mentions of ForthWrite yet. Tracking of ForthWrite recommendations started around Jun 2026.

What are some alternatives?

When comparing ipstack and ForthWrite, you can also consider the following products

ipinfo.io - Simple IP address information.

Superhuman - Superhuman is an email management tool.

ipapi - Web analytics with IP address lookup and location API

Gemini - Gemini, formerly known as Bard, is a generative artificial intelligence chatbot developed by Google. Based on the large language model (LLM) of the same name, it was launched in 2023 in response to the rise of OpenAI's ChatGPT.

ipgeolocation.io - Free IP Geolocation API and Accurate GeoIP Lookup Location Database

Lavender - Realtime coaching for sales emails.