Software Alternatives, Accelerators & Startups

Nextiva VS ForthWrite

Compare Nextiva VS ForthWrite and see what are their differences

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Nextiva logo Nextiva

Business VoIP, cloud phone systems trusted by more than 150,000 companies. Powered by the leading cloud PBX VoIP platform, Nextiva is rated the best business VoIP service provider.

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
  • Nextiva Landing page
    Landing page //
    2023-03-13
  • 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.

Nextiva

$ Details
-
Platforms
-
Release Date
-
Startup details
Country
United States

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

Nextiva features and specs

  • Comprehensive Features
    Nextiva offers a wide range of features like VoIP phone service, team collaboration tools, customer relationship management (CRM), and analytics, making it a strong all-in-one communication solution.
  • Scalability
    The platform is highly scalable, accommodating small businesses to large enterprises, allowing growth without the need to switch providers.
  • Reliable Uptime
    Nextiva is known for its reliable uptime and robust infrastructure, ensuring minimal disruptions to business communications.
  • User-Friendly Interface
    The platform is designed with ease of use in mind, providing an intuitive interface that reduces the learning curve for new users.
  • Good Customer Support
    Nextiva is highly rated for its customer support, offering various support channels including phone, email, and chat.

Possible disadvantages of Nextiva

  • Cost
    Nextiva can be relatively expensive compared to other VoIP service providers, particularly for small businesses or startups with limited budgets.
  • Initial Setup
    Some users report that the initial setup and configuration can be complicated and time-consuming.
  • Limited International Presence
    Nextiva's services are primarily focused on the U.S. market, which may be a limitation for businesses with a significant international presence.
  • Feature Overload
    While comprehensive, the extensive range of features can be overwhelming for some users, particularly those who might only need basic functionalities.
  • Integration Issues
    Some users have reported issues with integrating Nextiva with other third-party software or tools, which could be a hindrance for businesses relying on specific integrations.

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 Nextiva

Overall verdict

  • Overall, Nextiva is generally regarded as a strong choice for businesses looking for a reliable and feature-rich VoIP and communication solution. Positive customer feedback regarding service performance and customer support bolsters its reputation as a top contender in the business communications market.

Why this product is good

  • Nextiva is often praised for its comprehensive suite of communication tools that include voice, video conferencing, mobile apps, and messaging solutions. It boasts a user-friendly interface, reliable customer support, and robust integration capabilities with various business tools. The service aims to enhance business communication and collaboration, making it a popular choice among small to medium-sized businesses. Reviews also highlight its scalability, allowing businesses to grow without significant changes to their communication systems.

Recommended for

    Nextiva is recommended for small to medium-sized businesses that require a dependable, scalable, and easy-to-use communication platform. It's particularly suited for companies that value seamless integration with other business tools, prioritize strong customer support, and are looking for a unified communication solution that can grow with their business needs.

Analysis of ForthWrite

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

Nextiva videos

Nextiva VOIP Phone System Review 2020

More videos:

  • Review - What is Nextiva? (Hint: The ONLY Business Software You Need in 2019)
  • Review - Getting Started with Nextiva Business Communication Suite

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to Nextiva and ForthWrite)
Communication
100 100%
0% 0
Email
0 0%
100% 100
VoIP
100 100%
0% 0
Email Productivity
0 0%
100% 100

Questions & Answers

As answered by people managing Nextiva 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 Nextiva and ForthWrite. For example, how are they different and which one is better?
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Reviews

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

Nextiva Reviews

Teliqon vs Nextiva: Global Cloud Communication With Flexible Business Integration
Nextiva supports business SMS, team messaging and customer communication workflows within its UCaaS and contact center ecosystem. Bulk SMS infrastructure and telecom messaging services are more limited compared to dedicated messaging providers and are generally tied to communication services.
Source: teliqon.io
The 19 Best Call Center Software (& Features You Need) in 2022
Nextiva is an easy-to-use solution that helps you connect with more callers in less time and with fewer agents. With Nextiva, you get features like IVR, automatic call routing, and call queuing.
Top 10 VoIP providers in 2022
Nextiva is a VoIP provider that offers a simple yet robust phone system for businesses. Nextivaโ€™s business call management system contains features including unlimited calling, texting, faxing, call queuing, fast conference calling, and more. The company offers a full unified communications solution that includes audio, video, text, mobile apps and web collaboration. Nextiva...
Source: voip.review
Nextiva vs RingCentral Comparison
Nextiva provides one of the most comprehensive virtual phone systems on the market, which goes far beyond call handling. Sure, Nextiva allows you to transfer, hold, mute, and forward calls seamlessly, but thatโ€™s not where it shines the most. Nextiva offers conference calls with an unlimited number of participants, limitless virtual business SMS messaging, a built-in CRM...
7 Best Cloud PBX Solution for Small to Medium Business
The crown jewel behind Nextivaโ€™s success has been its continuous work on the NextOS platform. NextOS encapsulates all aspects of communication associated with a business environment. Specifically, Nextiva is dedicated to bringing together the team and client communications in one singular dashboard. This, in turn, provides a seamless digital call center experience.
Source: geekflare.com

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)

What are some alternatives?

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

RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies

ReclaimAI - Helps users prioritize their work and personal calendars

Dialpad - Switch is a cloud-based phone system built for Google Apps users.

Superhuman - Superhuman is an email management tool.

Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs

Shortwave - Email smarter & faster with a reinvented experience for your Gmail