| 15Five 15five.com | HR Tech | Email processing | USA |
| 3B Digital 3bweb.com | Marketing | Email infrastructure | USA |
| 7taps 7taps.com | EdTech | Email delivery for course materials and notifications | United States |
| ACA Group acaglobal.com | Compliance Technology | Email retention | United States of America |
| Accelevents accelevents.com | Event Management | SMTP Provider | USA |
| Ada ada.cx | AI/ML | Email Service Provider | USA |
| AllClients allclients.com | CRM Solutions | Email Services | USA |
| Altvia altvia.com | Private Equity | Email message delivery and mailing statistics | USA |
| Apica apica.io | Observability/Cybersecurity | Email delivery services | USA |
| Athos Commerce searchspring.com | E-commerce | Email delivery services for internal and customer notifications. | United States |
| Avo avo.app | Analytics | Email notifications | https://sendgrid.com |
| BigID bigid.com | Data Security & Compliance | Transactional Email | US |
| Blackboard blackboard.com | EdTech | Email delivery | United States |
| By Sprinto suprsend.com | Messaging and Notification Systems | Customer Service | United States of America |
| By Sprinto kyckr.com | Data Analytics | Customer Service | Unknown |
| By Sprinto us-global-mail.trust.site | Cloud Infrastructure | Customer Service | USA |
| Canoa canoa.supply | Productivity | Email processing | USA |
| Certa certa.ai | Risk Management/Cybersecurity | Transactional and marketing email delivery and management platform | USA only |
| Checkr checkr.com | HR Tech | Customer Communication | United States |
| CleverTap clevertap.com | Customer Engagement/Marketing Tech | Digital Advertising Tech | United States of America |
| ClubRunner clubrunner.ca | Membership Management Software | Email: Delivery & Statistics | United States |
| Contractbook contractbook.co | Legal Tech | Mail system that Contractbook utilises to send notifications about contracts. | US |
| Contractbook contractbook.com | Contract Management Software | Mail system that Contractbook utilises to send notifications about contracts. | US |
| Crayon crayon.co | Sales Enablement/Competitive Intelligence | Transactional email and notification platform | USA |
| Dashlane dashlane.com | Cybersecurity | Email campaign manager | United States |
| DeepConverse deepconverse.com | AI/ML, Customer Support Automation | Email Service Provider | US |
| Delibr delibr.com | Productivity | Email service provider used to send transactional emails | United States |
| DigitalOcean digitalocean.com | Cloud Infrastructure | Email services | USA (CO) |
| Disclo disclo.com | HR Tech | Transactional & marketing email service | USA |
| Dovico Timesheet dovico.com | Productivity Software | Application Transactional emails | USA |
| Drova drova.com | Risk Management / Compliance / Sustainability | Email Notification Services | United States |
| Elblearning elblearning.com | EdTech | Email computing services. | United States |
| Electronictenant electronictenant.com | PropTech | Messaging | — |
| Elementor elementor.com | Web Development | Routing and transmission of emails | USA |
| EventMobi eventmobi.com | Event Management Software | Transactional emails | USA |
| EventX eventx.io | Event Management | Email | United States of America |
| Evvnt evvnt.com | Event Promotion/Marketing | Email Delivery Services | USA |
| Examplit® examplit.com | EdTech | SMTP Provider | United States |
| Exos teamexos.com | HealthTech | Transactional emails | USA |
| Experiencequalified experiencequalified.com | AI Sales Development, Marketing Automation | Email Delivery Services | CA, US |
| Expo expo.dev | DevOps | Sending notification emails to customers | USA |
| FireHydrant firehydrant.io | DevOps | Transactional email delivery | United States |
| Firstup firstup.io | DevOps | Provider of in-platform email delivery service | United States |
| FlowEQ floweq.com | AI/ML, Customer Experience Management | Email delivery service | United States |
| Forest Admin forestadmin.com | Fintech | Cloud Service Provider (email API) | United States |
| Fyxer fyxer.ai | Productivity | Customer Service | United States of America |
| Gigs gigs.com | Fintech | Transactional Emails | USA |
| Gimletlabs gimletlabs.ai | AI/ML | Email | USA |
| GitGuardian gitguardian.com | Cybersecurity | Email sending service | United States |
| Glide glideapps.com | Cloud Infrastructure | Email delivery service. | Unknown |
| GoDataFeed Compliance godatafeed.com | E-commerce | Email service provider (SOC 2 Type 2 audited) | USA |
| Hellocustomer hellocustomer.com | Customer Experience Management (CXM) | Communication and notification services | EU / US |
| Hiive hiive.com | Fintech | Email delivery service | USA |
| Hiverhq hiverhq.com | Customer Service, AI | Send transactional emails | United States |
| Honeycomb honeycomb.io | Observability, DevOps | Transactional emails and alerts | US |
| HyperDX hyperdx.io | Observability | Email Alerts | United States of America |
| Inex One inex.one | Market Research | Cloud-based email notification services | USA |
| Intellischool intellischool.co | EdTech | Bulk email processing | San Francisco, CA (USA) |
| Junip junip.co | Marketing, E-commerce | Email delivery | United States |
| Kentik kentik.com | Network Intelligence, Cloud Infrastructure | Transactional email | 1801 California Street, Suite 500, Denver, CO 80202, US |
| Klaviyo klaviyo.com | Marketing Automation, AI | Email Delivery | United States |
| Learning Pool learningpool.com | EdTech | Transactional email delivery API | USA |
| Luzmo luzmo.com | Analytics | User e-mail address & name for sending of password resets, legal notices, scheduled dashboard exports, alerts via e-mail and/or SMS. | USA |
| MemberNova membernova.com | Member Management Software | Email: Delivery & Statistics | United States |
| NanoNets nanonets.com | AI/ML | Email delivery service | USA |
| Nativo nativo.com | Ad Tech | Email Marketing | USA |
| New Relic newrelic.com | Observability | Email messaging services | USA |
| Orlo orlo.tech | Community Engagement/Social Media Management | Used to send notifications via email, no data included in the emails. | USA |
| Outset outset.ai | Market Research, AI Research | Email delivery services | United States |
| Panther Labs panther.com | Cybersecurity | Email Delivery | United States |
| Parabola parabola.io | Workflow Automation | Transaction email provider | N/A |
| Partech partech.com | Hospitality Tech | Email sending | USA |
| Partech partech.com | Hospitality Tech | Email sending | USA |
| Prefect prefect.io | Analytics | Email notifications from the platform | USA |
| Procore Technologies procore.com | Construction Management Software | Email | United States |
| Qualified qualified.com | AI/ML | Email Delivery Services | USA |
| RainFocus rainfocus.com | Event Technology | Enable emails to be sent out, on behalf of clients, from the RainFocus Platform. It also enables password resets, MFA, etc. | United States |
| Readthedocs readthedocs.io | DevOps | Provides email delivery to dashboard and admin users for site notifications and other generated messages. | USA |
| Readthedocs readthedocs.com | DevOps | Provides email delivery to dashboard and admin users for site notifications and other generated messages. The body of notification emails can include user information, including email address. | United States |
| Recruiterbox recruiterbox.com | HR Tech | Email delivery and marketing | USA |
| Recurly recurly.com | Fintech | Email notification services | United States |
| Risingteam risingteam.com | — | Transactional | USA |
| Rows rows.com | Productivity | Email services | USA |
| Scappman scappman.com | Cloud Infrastructure | Azure Email service Provider for Scappman | US |
| Select select.dev | Cloud Infrastructure | Email Notification Services | USA |
| Showpad showpad.com | Sales Enablement, AI/ML | SMTP gateway | US |
| Signable signable.co.uk | HR Tech | Email sending | USA |
| Sine sine.co | HR Tech | Email functionality | USA, UK, India, Japan |
| Sparrow sparrow.com | HR Tech | Email processing | United States |
| Sparrow Connected sparrowconnected.com | HR Tech | Email Notifications | USA |
| Spinach spinach.ai | AI/ML | System & marketing emails | United States |
| Sprinto truthscan.com | AI Detection, Cybersecurity | Transactional email | — |
| Standard Metrics standardmetrics.io | Fintech | Email provider | US |
| Starmind starmind.ai | Knowledge Management, AI/ML | Email delivery service | Denver, Colorado, USA |
| Storylane storylane.io | Sales Enablement | Cloud service for sending emails | Not specified |
| SurveySparrow surveysparrow.com | Customer Experience, Analytics | Sending out Emails | United States |
| Synap synap.ac | EdTech | Owned and operated by Twilio, Sendgrid is a leading provider of email delivery services. We use Sendgrid to send automated emails from the Synap platform. | US |
| tawk.to tawk.to | Customer Communication | Sending email | USA |
| Telzio telzio.com | Cloud Communications | Automation of email delivery | USA |
| Testomatio testomat.io | DevOps | Email delivery | USA |
| Uberflip uberflip.com | Marketing | Provides Email notifications surrounding activities and events occurring within the Uberflip Platform. | United States |
| Virtru virtru.com | Cybersecurity | Email delivery | U.S. |
| Wearelearning wearelearning.io | EdTech | Email delivery for user management | EU |
| Whimsical whimsical.com | Productivity | Email service provider | USA |
| Willo Knowledge Base willo.video | HR Tech | Transactional email communications. | US |
| Windsor windsor.ai | Data Integration | Development Services | United States |
| WiseStamp wisestamp.com | Marketing | Transactional emails | USA |
| Writer writer.com | AI/ML | Email Communications | United States |
| Yesware yesware.com | Sales Engagement | Email service | USA |
| Zipy Sub Processor List zipy.ai | DevOps | Email support provider | USA |
| Zylo zylo.com | SaaS Management | Platform Email Service | 889 Winslow St., Redwood City, CA 94063 |