522 Email Marketing SaaS Companies in 2026
Email marketing SaaS companies build the software businesses send newsletters and campaigns with: email builders, automated sequences, list management, deliverability and reporting.
- Companies
- 522
- In LeadWave's database, October 2026
- Total funding raised
- $8.6B
- Across 149 funded companies
- Median headcount
- 17
- Of 423 with a known headcount
- Median year founded
- 2014
- Of 489 with a known year
The largest Email Marketing SaaS companies
The top 30 of 522, strongest matches first, then by size. Headcount is the latest known figure.
| Company | Website | Employees | Headcount | Funding | CEO | |
|---|---|---|---|---|---|---|
1 LeadVenture | leadventure.com | 1,001–5,000 | — | — | Tim MacDonald | |
2 Klaviyo | klaviyo.com | 1,001–5,000 | 2,882 | $678.5M | Ed Hallen | |
3 Substack | substack.com | 201–500 | 2,572 | $50M–100M | Chris Best | |
4 Sinch | sinch.com | 1,001–5,000 | 1,740 | $1.5B | Laurinda Pang | |
5 Attentive | attentivemobile.com | 1,001–5,000 | 1,230 | $863M | Brian Long | |
6 GetResponse | getresponse.com | 201–500 | 468 | — | Simon Grabowski | |
7 Brevo | brevo.com | 201–500 | 464 | $197.7M | Armand Thiberge | |
8 ClickFunnels | clickfunnels.com | 201–500 | 451 | $1M | Russell Brunson | |
9 SiteGround | siteground.com | 201–500 | 430 | — | Nikolay Todorov | |
10 dotDigital Group | dotdigitalgroup.com | 201–500 | — | — | Tink Taylor | |
11 Campaign Monitor | campaignmonitor.com | 201–500 | 276 | $250M | Dave Greiner | |
12 LiveIntent | liveintent.com | 201–500 | 241 | $65.1M | Matthew Keiser | |
13 beehiiv | beehiiv.com | 1–10 | 221 | $16.7M | Tyler Denk | |
14 Mailgun | mailgun.com | 51–200 | 193 | $51.1M | — | |
15 Omnisend | omnisend.com | 51–200 | 154 | — | Rytis Lauris | |
16 SAGE/Quick | sageworld.com | 51–200 | 140 | — | Eric Natinsky | |
17 Benchmark Email | benchmarkemail.com | 51–200 | 135 | — | Curt Keller | |
18 AiTrillion | aitrillion.com | 51–200 | — | — | Manoj Dhanotiya | |
19 Woodpecker.co | woodpecker.co | 51–200 | — | — | Maciek Ciesla | |
20 MailUp | mailup.com | 51–200 | 120 | — | — | |
21 Insightly | insightly.com | 51–200 | 119 | $38M | Anthony Smith | |
22 Customer.io | customer.io | 51–200 | 116 | $5.3M | Colin Nederkoorn | |
23 Kit | convertkit.com | 51–200 | 109 | — | Nathan Barry | |
24 Ghost | ghost.org | 51–200 | 108 | $7.3M | John O'Nolan | |
25 AWeber | aweber.com | 51–200 | 107 | — | Tom Kulzer | |
26 Jeeng | jeeng.com | 51–200 | 82 | $1.5M | Jeff Kupietzky | |
27 Flowbox | getflowbox.com | 51–200 | 75 | $8.3M | Marcus Carloni | |
28 BriefYourMarket.com | briefyourmarket.com | 51–200 | 70 | — | Nigel Basel | |
29 MailerLite | mailerlite.com | 51–200 | 68 | — | Ignas Rubezius | |
30 Sendlane | sendlane.com | 51–200 | 66 | $24.5M | Jimmy Kim |
Email Marketing SaaS companies at a glance
- 55% are headquartered in United States, followed by United Kingdom.
- The largest is LeadVenture, with 1,001–5,000 employees.
- 149 have disclosed funding, $8.6B in total; 18 raised $100M or more.
- Half were founded before 2014, and 10% in 2020 or later.
- United States282 · 55%
- United Kingdom35 · 7%
- Canada28 · 5%
- India27 · 5%
- Australia13 · 3%
- Spain13 · 3%
- 1–10196 · 39%
- 11–50191 · 38%
- 51–20078 · 15%
- 201–50024 · 5%
- 501–1,0008 · 2%
- 1,001–5,00011 · 2%
- 5,001–10,0001 · 0%
- 10,000+0 · 0%
- Before 200024 · 5%
- 2000–200992 · 19%
- 2010–2014146 · 30%
- 2015–2019179 · 37%
- 2020–202242 · 9%
- 2023 or later6 · 1%
- Under $1M45 · 30%
- $1M–5M40 · 26%
- $5M–10M14 · 9%
- $10M–50M22 · 14%
- $50M–100M13 · 9%
- $100M–500M13 · 9%
- $500M–1B4 · 3%
- $1B+1 · 1%
How this list was built
A company is on this list if LeadWave tags it as email marketing, or its description or website presents email marketing or newsletter software. A newsletter sign-up form alone doesn't count.
The data comes from LeadWave's database of SaaS and AI companies, last updated in October 2026. Companies that share a website are counted once. Headcount, funding and CEO come from public sources, so some fields are blank for smaller companies.
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- USA SaaS companies listFull list with CEO contacts
- UK SaaS companies listFull list with CEO contacts
- Europe SaaS companies listFull list with CEO contacts
Frequently asked questions
LeadWave's database lists 522 Email Marketing SaaS companies as of October 2026. This page shows the 30 largest; the full list, with CEO contacts, is part of our 15,000+ SaaS companies list.
By headcount, LeadVenture, with 1,001–5,000 employees, followed by Klaviyo and Substack.
United States: 55% of those with a known headquarters, followed by United Kingdom at 7%.
Sinch ($1.5B), Attentive ($863M) and Klaviyo ($678.5M), by total disclosed funding.
LeadWave's SaaS companies list covers 15,000+ companies and 16,000+ CEOs, with verified CEO emails, LinkedIn profiles, headcount and funding in one CSV. It's on the List of SaaS Companies page.
The platform that sends a company's marketing email: it stores the list, builds and schedules campaigns and automations, handles unsubscribes and tracks opens and clicks.