The best alternatives to sendso are GMass, lemlist, and Scary Senders. If these 3 options don't work for you, we've listed a few more alternatives below.
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Agree.com— Free e-signature for everyone with invoicing and payments!
GMass allows you to easily schedule emails, send out mass emails and mail merge campaigns and more with Gmail! Click here to learn about more features!
Tracking pixels and open tracking in your emails are spooky 👻 That’s why we at SendStack created a fun and easy-to-use email scanner to let you analyze any of your emails. Just forward them and you'll see the result in a second.