Growth · alternatives · 2026

24 alternatives to Email Subject Line Analyzer

Will you stand out in the inbox and get more opens?

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Email Subject Line Analyzer launched in 2017; newer entries below may have overtaken it.

1. 1
   Send Check It Subject Line Tester▲206

   Write better email subjects with this tool

   2017 · sendcheckit.com · its alternatives →

2. 2
   analyze.email▲136

   Test the spam-y-ness of your emails

   2017 · analyze.email · its alternatives →

3. 3
   Cold Email Analyzer by Mailshake▲222

   Real-time analysis of email subject lines and copy

   2018 · mailshake.com · its alternatives →

4. 4
   Email Testing By Inbox Pirates▲355

   Preview, analyze & test emails with one click

   2022 · inboxpirates.com · its alternatives →

5. 5
   OpenHigher AI▲246

   Unignorable email subject lines powered by GPT-4

   2023 · its alternatives →

6. 6
   Email Subject Line Generator▲130

   Instantly generate catchy email subject lines

   2023 · subjectlinegenerator.com · its alternatives →

7. 7
   Mailytics▲119

   Monitor & analyze competitor email campaigns

   2016 · hnryjms.io · its alternatives →

8. 8
   Lead Finder▲119

   Find any email from a company in seconds. free

   2018 · expireddomains.com · its alternatives →

9. 9
   Cold Email Subject Lines▲112

   100+ subject lines proven to boost your email open rates

   2021 · its alternatives →

10. 10
    Reviewik▲209

    Customer emails into insights: topics, keywords, sentiment

    2024 · darulamanperdana.my · its alternatives →

11. 11
    Everything Email Podcast - Subject Lines▲62

    Ever wonder why one subject line works and another doesn’t?

    2016 · soundcloud.com · its alternatives →

12. 12
    LeadsFinder by Reply▲201

    Free crowdsourced database of business emails

    2017 · leadsfinder.io · its alternatives →

13. 13
    Inbox Grader by Freshworks▲143

    Free metrics 📈 for your business and team email ✉️

    2018 · inboxgrader.com · its alternatives →

14. 14
    Email subject line tester▲7

    Testing tool for email marketing, previews the subject line.

    2018 · emailtooltester.com · its alternatives →

15. 15
    MailCharts▲163

    Track & Understand How Your Competitors Use Email Marketing

    2014 · mailcharts.com · its alternatives →

16. 16
    Free AI Email Subject Line Generator▲174

    Create impactful unique subject lines using AI and GPT-3

    2021 · encharge.io · its alternatives →

17. 17
    Ortto AI Subject Line Writer▲95

    Predict open rate before you send an email

    2022 · ortto.com · its alternatives →

18. 18
    Inbox Report▲160

    Compare your email workload with other busy professionals

    2024 · inbox-report.maestrolabs.com · its alternatives →

19. 19
    SellScale Email Grader▲117

    Get instant feedback on your sales emails

    2024 · sellscale.com · its alternatives →

20. 20
    Litmus Subject Line Checker▲5

    Preview your subject line in 15+ email clients in real time

    2016 · litmus.com · its alternatives →

21. 21
    Email Insights▲154

    See and track your competitors' email

    2014 · its alternatives →

22. 22
    Kahuna Subject Line▲7

    AI-powered analytics for email subject lines that perform

    2018 · kahuna.com · its alternatives →

23. 23
    Swifter▲161

    Email subject line generator for B2B & B2C, built with GPT-3

    2021 · its alternatives →

24. 24
    MailMentor▲162

    A data driven approach to writing better email

    2015 · mailmentor.io · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →