4
Boomerang
Boomerang offers email productivity and meeting scheduling through browser extensions and mobile apps.
Free planAndroidiOSWebExtension
8.0From $4.98 a month
Visit
5
Right Inbox
Right Inbox is a Gmail productivity tool for tracking, scheduling, and automating email.
Free planWebExtensionLinuxmacOS
7.9From $9.95 a month
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6
Instantly
Instantly combines cold email automation with a built-in B2B lead database for sales outreach.
AndroidiOSWebAPI
7.8From $47 a month
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7
Yesware
Yesware is a sales engagement platform that brings email tracking, templates, and automated outreach into Gmail and Outlook.
Free planWebExtensionmacOSWindows
7.3From $19 a month
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8
Klenty
Klenty is a sales engagement platform for phone-first SDR teams.
WebAPIExtension
7.2From $50 a month
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9
Saleshandy
Saleshandy is a multichannel outbound platform for finding leads, contacting prospects, and booking meetings.
AndroidiOSWebAPI
7.2From $34 a month
Visit
10
Woodpecker
Woodpecker is a cold email and LinkedIn outreach tool for businesses running outbound campaigns.
WebAPIExtension
7.2
Visit
11
Hunter
Hunter is an email outreach platform for people in marketing, sales, recruiting and other work that involves contacting people by email.
Free planWebAPIExtension
6.9From $34 a month
Visit
12
Outplay
Outplay is a sales engagement and automation platform for account research, prospecting, and coaching.
Free planWebExtension
6.9From $39 a month
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13
ReplySequence
Free planWebAPI
6.9From $29 a month
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14
Scurry
Scurry turns sales meeting transcripts into personalized, multi-touch follow-up email sequences.
Free planWeb
6.8From $79 a month
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15
Snov.io
Snov.io is a lead generation and sales outreach platform for finding prospects, enriching contact data, and running email and LinkedIn campaigns.
WebAPIExtension
6.8From $39 a month
Visit
16
YAMM
YAMM is a mail merge tool for Gmail and Google Sheets, available as an extension and on the web.
Free planWebExtension
6.8From $25 a year
Visit
17
ReachInbox
ReachInbox is an AI-powered cold outreach platform for finding prospects, personalizing email campaigns, and coordinating replies.
Free planWebAPI
6.7From $30 a month
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18
lemlist
lemlist is a paid sales engagement platform for finding leads, personalizing outreach, and running campaigns across several channels.
WebAPIExtension
6.6From $55 a month
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19
Reply.io
Reply.io is a sales engagement and cold email outreach platform for businesses and sales teams.
WebAPIExtension
6.6From $59 a month
Visit
20
SendLater
SendLater is a Windows add-in for Microsoft Outlook that schedules email messages for a chosen time.
Free planWindows
6.6Free plan
Visit
21
Smartlead
WebAPI
6.6From $39 a month
Visit
22
GMass
GMass sends newsletters, announcements, cold campaigns, and transactional email from inside Gmail through an extension and the web.
WebExtension
6.5From $349 a year
Visit
23
QuickMail
WebAPIExtension
6.5From $49 a month
Visit
24
SmartReach.io
WebAPIExtension
6.5From $29 a month
Visit
25
Overloop
WebAPIExtension
6.4From $69 a month
Visit
26
Mailshake
Mailshake is sales engagement software for automating outreach and generating leads.
WebExtension
6.3From $25 a month
Visit
27
NuReply
NuReply is an AI-powered B2B cold-email outreach platform for sales teams, founders, and marketers.
WebAPI
6.3From $25 a month
Visit
28
Schedule Email
Schedule Email is a Chrome browser extension that lets users schedule messages to send from Gmail at a selected time.
Free planExtension
6.3From $4.99 a month
Visit
29
SendEmAll
SendEmAll is an outbound sales platform that brings together B2B lead search, campaign sequencing, and sending infrastructure.
WebAPI
6.0From $1.50 a month
Visit

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