Suggestions appear as you type. Use the up and down arrows to choose one and Enter to open it.

This page's audience our own tag's counts — open to see them
–Visits
–Page views
–Clicks to vendors
–Time on page
–Reading now
Clicks to vendors, by tool
  • –
Top countries
  • –
Devices
  • –

– · visits, page views and clicks counted by our own tag, which counts more than our checked analytics; every figure rounded down · how we count

Head-to-head · AI Email Writing Tools

ForthWrite vs Kerna

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score ForthWrite #5 in AI Email Writing Tools 7.9/10 Free plan · 14-day trial Free planFree trial✓ 3 of 3 features Visit ForthWrite
Kerna #6 in AI Email Writing Tools 7.8/10 Free plan Free plan✓ 2 of 3 features Visit Kerna

ForthWrite leads on 1 check, Kerna on 0, and 3 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreForthWrite · 7.9/10
  • Free planboth
  • Free trialonly ForthWrite
  • Most featuresForthWrite · 3 of 3

ForthWrite scores higher on our rubric for ai email writing tools: 7.9 against 7.8 out of 10; our editors rank them #5 and #6.

ForthWrite offers browser extension; Kerna doesn't.

ForthWrite is the better fit for teams needing personalized email automation. Kerna is the better fit for multilingual email and inbox workflows.

  • ForthWrite fits best

    Teams needing personalized email automation

  • Kerna fits best

    Multilingual email and inbox workflows

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature ForthWrite 7.9/10 Visit ↗ Kerna 7.8/10 Visit ↗
At a glance
Editor score 7.9 7.8
Ranking #5 in AI Email Writing Tools #6 in AI Email Writing Tools
Best for Teams needing personalized email automation Multilingual email and inbox workflows
Pricing model Free plan + paid Free plan + paid
Starting price — €12/mo
Free plan ✓ ✓
Free trial 14 days —
Deployment Cloud, Desktop, Browser extension Cloud
Platforms Web, Windows, macOS, Chrome extension Web, Windows, macOS
Support Email, Docs Email, Docs
Compliance SSO/SAML GDPR
Integrations 5 integrations 6 integrations
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features ForthWrite 3/3 · Kerna 2/3
Tone controls ✓ ✓
Custom instructions ✓ ✓
Browser extension ✓ (best) —
Specs
Email context input Thread Thread
Mail client support Both Both
Supported languages Not checked yet 45 languages
Our review
Pros
  • Matches writing style from sent-email history
  • Understands threads, recipients, and email intent
  • Adds batch drafting, analytics, and team administration
  • Drafts replies and new messages with selectable tones and intents
  • Translates email in 45 languages and summarizes threads
  • Extracts data from emails and attachments for export to common office tools
Cons
  • Free plan is limited to 10 drafts per week
  • Advanced capabilities are reserved for paid tiers
  • The focus is email drafting rather than broader automation
  • Starter, Standard and Pro plans are limited to one user
  • No browser extension is listed among its supported features
  • Usage is governed by monthly token allowances or shared token pools
Our verdict

ForthWrite is an AI email drafting tool for professionals and teams that need personalized replies at scale. It analyzes email threads and sent-email history to generate drafts that match a user’s writing voice. The Chrome extension works…

Read the review →

Kerna is an AI email assistant for people and organizations working in Gmail or Outlook. It drafts replies from email threads, composes new messages from topics or saved instructions, summarizes conversations, translates email in 45…

Read the review →
  1. ForthWriteAI Email Writing Tools 7.9Free plan · 14-day trial
  2. KernaAI Email Writing Tools 7.8Free plan

Strengths and trade-offs

  • ForthWrite — where it wins

    • Matches writing style from sent-email history
    • Understands threads, recipients, and email intent
    • Adds batch drafting, analytics, and team administration

    Where it doesn't

    • Free plan is limited to 10 drafts per week
    • Advanced capabilities are reserved for paid tiers
    • The focus is email drafting rather than broader automation

  • Kerna — where it wins

    • Drafts replies and new messages with selectable tones and intents
    • Translates email in 45 languages and summarizes threads
    • Extracts data from emails and attachments for export to common office tools

    Where it doesn't

    • Starter, Standard and Pro plans are limited to one user
    • No browser extension is listed among its supported features
    • Usage is governed by monthly token allowances or shared token pools

More comparisons

All AI email writing tools comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update