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Looking for an email API that can connect directly to any service provider and power two-way, conversational email in your app? Transactional APIs like SendGrid are great for one-way, mass email notifications, but Nylas is the only email API that supports contextual email use cases with near-perfect deliverability.
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Contextual APIs connect directly to users’ email accounts for a more conversational email experience, while Transactional APIs support large-scale outreach beyond rate limits. Many teams use both APIs to deliver a unified experience.
Build an integrated email client, power automated outreach, and centralize all conversations in one view.
Send high volumes of personal email messages with high deliverability through a shared address.
Send and track templated, large-scale marketing campaigns, product alerts, and promotional offers.
We built Nylas on a secure, performant platform trusted by 200,000+ developers.
Integrate with any email provider
Empower users to send messages through their preferred email address. Nylas supports 100% of service providers through a single API, including Google. Microsoft, Apple, Yahoo, and more.
Confidently deliver email
Don’t stress about sender reputation. Instantly tap into 99.6% (industry-leading) deliverability and avoid one of the primary signals service providers use to flag SPAM by sending directly from service providers.
Manage replies with ease
Intuitive, out-of-the-box reply management. Unlock conversational, contextual email use cases by surfacing replies in your application without additional processing.
Nylas connects directly to email service providers (ex: Gmail, Outlook). Emails sent and received in your email client are viewable in your application, and vice versa.
Twilio SendGrid connects to a third-party IP to deliver email from a single address or domain (such as do-not-reply@
Get near-perfect (99.6%) deliverability by sending from user inboxes using Nylas, not a proxy IP.
Transactional APIs send email through proxy (third-party) IPs, resulting in 80% deliverability on average.
Nylas sends email through service providers, meaning we’re restricted to daily rate limits (these vary by provider).
Twilio SendGrid is not beholden to provider rate limits, meaning you can deliver mass email campaigns within a short period of time.
With Nyas, it’s easy and intuitive to sync replies within your app thanks to our bi-directional sync.
With SendGrid, you’ll need to set up an inbound parse webhook to receive replies.
Nylas supports threading, folders, labels, search, and other quality-of-life features out of the box.
Transactional APIs aren’t built with reply management in mind and offer no out-of-the-box support for critical quality-of-life features.
Over 250,000 developers at industry-leading brands and fast-growing companies use the Nylas API to deliver core communication features
With security built into the core of our products, you can rest assured knowing your data will always be safe, secure, and protected. Learn more about Nylas security
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Discover the power of the Nylas platform and connect up to 5 accounts for free.
SendGrid is a leading marketing and transactional email API that developers can use to deliver messages at scale. With the Twilio SendGrid Email API, developers can send transactional emails programmatically, create templates, and track marketing campaign performance.
When deciding between Nylas and SendGrid, the first question you should ask yourself is: What am I trying to build? If, for example, you’re integrating email in a CRM so that users can view and send emails from their inbox without switching tools, then a contextual email API like Nylas is the best option for your use case. But if you’re supporting mass send use cases in your product such as email marketing campaigns, automated billing updates, or product alerts, then Twilio is likely your best fit.
Contextual email APIs offer direct access to data from users’ personal accounts with email service providers (such as Google or Microsoft). Contextual email APIs are designed for devs that need to embed send and receive email capabilities, inbox management tools, and analytics in their app—all with near-perfect deliverability.
Transactional email APIs deliver email through proxy or third-party IPs. Transactional APIs are designed for developers who need to deliver email at a massive scale, well beyond daily provider rate limits.
Nylas adheres to the most stringent security standards such as GDPR, CCPA, GLBA, and DPA. With security built into the core of our products, we also engage with respected 3rd party firms to audit our infrastructure and security practices, resulting in a SOC 2 Type II audit report, SOC 1 Type I audit report, HIPAA/HITRUST report, and ISO 27001 certification.