Growth · alternatives · 2026

24 alternatives to 50 Subject Lines To Boost Your Open Rate

Email subject lines for different type of eCommerce emails

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. 50 Subject Lines To Boost Your Open Rate launched in 2021; newer entries below may have overtaken it.

1. 1
   Cold Email Subject Lines▲112

   100+ subject lines proven to boost your email open rates

   2021 · its alternatives →

2. 2
   800+ Awesome Email Subject Lines▲16

   800+ Awesome Email Subject Lines That Get Opened.

   2021 · its alternatives →

3. 3
   Everything Email Podcast - Subject Lines▲62

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

   2016 · soundcloud.com · its alternatives →

4. 4
   Email Subject Line Generator▲130

   Instantly generate catchy email subject lines

   2023 · subjectlinegenerator.com · its alternatives →

5. 5
   Formatted Email Subject Lines by cloudHQ▲148

   Popping email subject lines in bold, italics, strikethrough

   2020 · chromewebstore.google.com · its alternatives →

6. 6
   Free AI Email Subject Line Generator▲174

   Create impactful unique subject lines using AI and GPT-3

   2021 · encharge.io · its alternatives →

7. 7
   Best Email Subject Line▲3

   Improve subject lines and boost open rates.

   2020 · its alternatives →

8. 8
   Programming for Marketers▲171

   Free email course for wannabe technical marketers

   2015 · programmingformarketers.com · its alternatives →

9. 9
   Capture▲136

   The Smartest Way To Grow Your Email List

   2014 · gleam.io · its alternatives →

10. 10
    Spently▲92

    Turn your transactional emails into marketing opportunities.

    2016 · spently.com · its alternatives →

11. 11
    MailCharts for Online Retailers▲82

    Stop using a secondary Gmail account to plan your emails

    2016 · mailcharts.com · its alternatives →

12. 12
    AI Subject Line Generator▲96

    Generate a brilliant subject line in seconds, with GPT

    2023 · ecosend.io · its alternatives →

13. 13
    Marketing School - Get More People To Open Your Emails▲64

    7 tips to get higher open rates

    2016 · traffic.libsyn.com · its alternatives →

14. 14
    OpenHigher AI▲246

    Unignorable email subject lines powered by GPT-4

    2023 · its alternatives →

15. 15
    Autoklose’s New eBook ▲71

    Guide to crafting killer subject lines

    2023 · app.autoklose.com · its alternatives →

16. 16
    The Secrets of the Elusive Newsletter▲74

    A handy guide to getting started with email marketing

    2016 · conversio.com · its alternatives →

17. 17
    Email Spotlights▲141

    The best brand emails, annotated.

    2021 · emailmastery.org · its alternatives →

18. 18
    Reviewik▲209

    Customer emails into insights: topics, keywords, sentiment

    2024 · darulamanperdana.my · its alternatives →

19. 19
    CRO School▲32

    21 emails to growth hack your ecommerce conversions

    2024 · its alternatives →

20. 20
    Crafting Winning Subject Lines▲38

    How to focus on the long game & turn opens into conversions

    2021 · mailmodo.com · its alternatives →

21. 21
    Email Lists Made Easy for Writers and Bloggers▲68

    Simple (and maybe even FUN) email marketing start to finish

    2016 · amazon.com · its alternatives →

22. 22
    104 Ecommerce Newsletter Campaign Ideas▲79

    A collection of ecomm campaigns ideas with 500+ examples

    2022 · panoramata.co · its alternatives →

23. 23
    QuickLists▲80

    Simple, verified email lists

    2017 · its alternatives →

24. 24
    Emails That Win (book)▲98

    How to write crisp, compelling emails that win you clients

    2015 · 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 →