Companies Using Amazon SES

With 10+ years in web crawling and technographic data analysis, I've examined Amazon SES's growth since its January 2011 launch from a niche AWS service to one of the most widely deployed email infrastructure platforms in the world. This analysis draws on our enrichment of 149,649 companies matched to LinkedIn profiles out of 204,870 detected domains (a 73.0% match rate), cross-referenced with AWS's published case studies and 192 G2 reviews, as of our August 2026 crawl.

Growth trajectory

Amazon SES first appeared in our long-run detection history in August 2012 with 418 active domains. By December 2024, that number hit 102,550, a 245x increase. Steady growth from 2012 to 2017 (7,451 domains by January 2017) gave way to sharp acceleration through 2018 to 2022, reaching 56,199 by January 2022. That inflection coincided with enterprise cloud migration and AWS's push to make SES a first-class service.

Our current crawl, which covers a wider slice of the web, now detects SES on 204,870 domains and the count is flat month over month (203,511 in July 2026, 204,870 in August). Those two figures are not like-for-like, because the set of domains we crawl turns over every month, with dead sites dropping out and newly discovered ones added, and our detection signals widen over time, so treat the step across the chart's 2025-to-2026 gap as coverage rather than growth. AWS reports SES now processes over 1 trillion emails per year. SES keeps shipping: Mail Manager (May 2024), Global Endpoints for multi-region failover (December 2024), Email Validation for pre-send address checking (December 2025), and Amazon Q integration for troubleshooting (December 2025).

Sales Signal: Only 3,018 domains have dropped SES since we began tracking it in March 2026 (2.05%). Read that as partly an artefact: our signal is an SPF include:amazonses.com, and a stale include costs nothing to leave behind, so the figure understates real switching. Prospecting here still means displacing infrastructure rather than swapping a campaign tool.

"SES went from a sidecar service that developers added because they were already on AWS to a genuine enterprise email platform. It shows the least measurable churn of anything in this category, though an SPF include is a generous instrument and some of that is the measurement rather than the market." - Mehmet Suleyman, CEO at TechnologyChecker.io

Customer profile

The size distribution reveals a two-tier market. On one side, 45.3% of SES customers have 1 to 10 employees, the micro-business and solo developer segment that picks SES for its $0.10/1,000-email pricing, and 74.5% have fewer than 50. On the other side, 0.52% are enterprises with 10,001+ employees, including Pfizer, ICICI Bank, Tata Motors, and Schlumberger, each pushing serious email volume. Age data reinforces the split: 36.75% were founded in the 2010s, while 7.09% predate 1960.

Netflix's case study confirms the enterprise pattern. Their SES deployment replaced an in-house SMTP setup, not another cloud email vendor. According to AWS, Netflix achieved 99%+ inbox placement and a 97/100 sender reputation score after migration. Redfin's case study shows similar results: 20M+ daily emails with 99% deliverability. These aren't departmental experiments. They're company-wide infrastructure decisions. Smaller companies get outsized results too: theMarketer, a Romanian marketing platform, cut email sending costs 70% after moving to SES and tripled its client base within two years (per their AWS case study).

Sales Signal: Two distinct prospect pools exist. For startups, the pitch is cost (SES is 3-10x cheaper than SendGrid or Mailgun at volume). For enterprises, the pitch is AWS consolidation, since teams already running compute, storage, and databases on AWS save operational overhead by moving email there too.

Industry and geographic concentration

Software Development leads at 8.03%, followed by IT Services and IT Consulting (6.34%) and Technology, Information and Internet (4.94%). Combined, tech industries account for 19.31% of the base, the highest tech concentration of any sender we track. That's expected for an API-first email service. The long tail matters more: Financial Services at 4.13%, Retail at 3.75%, and Real Estate at 2.64% all show SES expanding well past its developer-native origins.

Geographically, the United States accounts for 33.3% of enriched companies. The UK (9.1%) and Australia (6.3%) round out the English-speaking core, which together reach only about 53%, the most international profile of any platform in this category. Brazil (5.2%), the Netherlands (3.9%), Germany (3.9%), and India (2.8%) follow, spread across 214 countries in all. That global reach tracks with SES's multi-region architecture.

Sales Signal: Financial services and healthcare are underpenetrated relative to their size in the global economy. Banks and insurers need transactional email (statements, alerts, compliance notices) and SES is in scope for HIPAA, SOC, PCI, and FedRAMP per AWS's compliance validation docs. Valant Medical Solutions, which serves 2,500+ behavioral health practices, already uses SES for automated patient reminders across email, SMS, and voice (per their published AWS case study). Target HubSpot users in financial services who need a cheaper transactional layer alongside their marketing stack.

Migration patterns

Migration here counts domains we watched switch since March 2026, so the numbers are small by design and current by construction. SES is net positive against every tracked competitor. The numbers: 197 gained from SendGrid versus 95 lost (2.07:1), and 182 gained from Mailgun versus 69 lost (2.64:1). The largest raw corridor is MailChimp at 428 in against 80 out, and even Klaviyo, which is winning almost everywhere else, runs 118 in against 60 out here. The direction is clear: developers are consolidating email into their existing AWS accounts.

Sales Signal: The migration data creates two opportunities. First, target companies currently on SendGrid or Mailgun that also use AWS compute, since they're the most likely to consolidate. Second, the 95 companies that left SES for SendGrid did so for a reason, probably SendGrid's better UI and managed deliverability features. That pain point is a selling opportunity for email consultants.

"The ratios are net positive across the board, but the interesting number is the handful that go the other way. They trade cost savings for developer experience, and that tells you exactly where SES still needs to improve." - Mehmet Suleyman, CEO at TechnologyChecker.io

Technology ecosystem

The tech stack data tells us what kind of companies run SES. Google Analytics appears on 64.72% of SES domains, consistent with web-facing businesses, and Cloudflare Browser Insights on 12.72%. HubSpot at 9.03% is the top marketing automation pairing and the highest such overlap of any sender in this category, suggesting many SES customers use it for transactional email while running campaigns through HubSpot.

WordPress leads the CMS side at 32.89%, with Webflow (2.8%) and Drupal (1.69%) behind it. Ecommerce overlap is thin: WooCommerce at 5.09% and Shopify at 4.11%, well below what campaign platforms show. That's the signature of a service bought for system mail, not storefront marketing.

Sales Signal: Nine in ten SES domains carry no marketing automation platform we can detect. That's an upsell opportunity for marketing tools targeting SES's 204,870-domain base, and a clear qualifier: if they've already got HubSpot, they've solved the campaign side and you're selling into the transactional layer.

G2 review signals

G2's aggregated data (192 reviews, 4.3/5 rating) aligns closely with our crawl observations. The top pro, deliverability (12 mentions), is validated by Netflix's 99%+ inbox placement and Redfin's 99% deliverability rate in their published case studies. Affordability (11 mentions) checks out too, since SES's $0.10/1,000-email pricing is 3-5x cheaper than SendGrid or Mailgun at similar volumes. The top con, initial setup complexity (8 mentions), explains why adoption skews toward teams already familiar with AWS. The console interface criticism (5 mentions) is consistent with SES's developer-first philosophy: the API is the real product, not the dashboard.

Sales Signal: The setup complexity creates a services opportunity. Agencies and consultants that specialize in AWS email configuration can target the 65,229 micro-businesses on SES that likely struggled with initial setup and may need ongoing deliverability optimization.

Key takeaways

1. SES grew 245x across our detection history (418 to 102,550 domains by December 2024), driven by the enterprise cloud migration wave, and our current crawl now finds it on 204,870.

2. Two-tier customer base: 45.3% micro-businesses drawn by pricing, plus a small enterprise tier consolidating on AWS.

3. Low measured churn at 3,018 domains dropped since March 2026 (2.05%) — but the SPF-include signal survives a switch away, so treat it as a floor on real churn.

4. Horizontal adoption: no industry exceeds 9%, confirming SES as infrastructure-level tooling, though tech verticals combine for 19.31%.

5. Vendor-verified scale: Netflix (hundreds of millions daily), Redfin (20M+ daily), Grab (34M+ users) prove enterprise readiness.

6. Key vulnerability: setup complexity and a thin console limit adoption beyond AWS-native teams.

Sales applications

Outreach template: "Hi [Name], I noticed [Company] is running SendGrid on AWS infrastructure. Companies like [Peer Company] in your space have cut email costs by 60-80% by consolidating to Amazon SES. Our data shows SES taking domains off SendGrid at better than two to one right now. Happy to share the migration patterns for [Industry] if that's useful."

Targeting strategy: On TechnologyChecker.io, filter for companies using SendGrid or Mailgun that also show AWS infrastructure signals (CloudFront, S3, EC2). Sort by company size 51-200 employees for the sweet spot: large enough to benefit from cost savings, small enough to make migration decisions quickly.

Competitive angle: The companies that leave SES for SendGrid want better UI and managed deliverability. Target SES customers in non-tech industries (hospitality, real estate) who need a less technical solution.

For the full dataset of 204,870 companies using Amazon SES with filtering by industry, size, country, and technology stack, visit TechnologyChecker.io.