Nylas Agent Accounts reached general availability in June 2026: hosted email-and-calendar identities for AI agents from an established enterprise vendor. It's a credible product, and if you're reading this you've probably tried it or priced it. The two things that send developers looking for an alternative are usually the same two things: the 7-day message retention default, and the fact that pricing beyond the free tier means talking to sales. This page lays out the differences honestly, using Nylas's published details as of August 2026.
Bottom line: Dead Simple Email is the like-for-like alternative for the email side. Messages persist instead of expiring after 7 days, the entire pricing ladder is published ($0 / $5 / $29 / $99 per month), sending scales with your plan rather than a 100/day per-account default, and every inbound email is scanned for prompt injection. You sign up and ship the same day — no sales call. What DSE deliberately does not do is calendar: if your agent needs email + calendar as one bundled identity, Nylas is the better fit.
The Retention Problem
As of August 2026, each Nylas agent account defaults to a 7-day message retention window, alongside defaults of 100 outbound emails per day and 1GB of storage per account. For a demo agent that's fine. For a production agent, it's a real constraint: any workflow where the agent needs to re-read last month's thread, prove what was agreed, or use its inbox as long-term memory breaks when the messages age out.
Dead Simple Email stores messages persistently. Your agent's inbox is durable state — searchable, threadable, and still there in six months. That's not an add-on or an enterprise negotiation; it's the default on every plan, including free.
Pricing Comparison
Nylas Agent Accounts has a free tier — 3 agent accounts, 3,000 emails/mo, 3GB of storage as of August 2026 — but doesn't publish what comes after it. Scaling past free means an enterprise conversation. Dead Simple Email publishes every tier on the pricing page.
| Plan | Dead Simple Email | Nylas Agent Accounts (Aug 2026) |
|---|---|---|
| Free | 5 inboxes, 5,000 emails/mo | 3 agent accounts, 3,000 emails/mo, 3GB |
| Entry paid | $5/mo — 15 inboxes, 15,000 emails | Not published — contact sales |
| Mid tier | $29/mo — 100 inboxes, 100,000 emails | Not published — contact sales |
| Scale | $99/mo — 500 inboxes, 500,000 emails | Not published — contact sales |
| Message retention | Persistent — messages don't expire | 7-day default per account |
| Send limits | Plan-level, up to 500k/mo | 100 outbound/day per account default |
The point isn't that Nylas is expensive — we genuinely don't know what it costs at scale, and as of August 2026 neither will you until you've had the sales call. The point is predictability: with DSE you can price a 100-agent deployment from the website in ten seconds.
Feature Comparison
| Feature | Dead Simple Email | Nylas Agent Accounts (Aug 2026) |
|---|---|---|
| Scope | Email-only, production quality | Email + calendar bundled |
| Programmatic inbox/account creation | Yes | Yes |
| Message retention | Persistent on all plans | 7-day default per account |
| Per-account storage | Persistent message store | 1GB default per account |
| Outbound sending | Plan-level (5k–500k/mo) | 100/day per account default |
| Public pricing | All tiers published ($0/$5/$29/$99) | Free tier only; enterprise opaque |
| Visual dashboard | Yes (all plans) | Enterprise product surface |
| Prompt-injection scanning | Yes — every inbound email, scored | Not a stated feature |
| Verification-code / OTP extraction | Yes (agents self-onboard) | Not a stated feature |
| Webhooks + streaming | Webhooks, WebSocket, SSE — all plans | Webhooks |
| MCP server | Yes — in the official MCP registry | Yes |
| IMAP/SMTP access | Yes — every inbox | Provider-normalized API |
| Calendar | No (email-only by design) | Yes — bundled |
| Onboarding | Self-serve, free tier, no card | Free tier, then enterprise sales |
Where Dead Simple Email Wins
Messages don't disappear. Persistent storage on every plan. An agent's inbox is its memory and its audit trail; a 7-day default retention window undermines both. This is the single biggest reason teams pick DSE over Agent Accounts.
Transparent, predictable pricing. $0 / $5 / $29 / $99, published, flat per tier. No quote, no procurement cycle, no surprise at renewal.
Send limits that scale with the plan. DSE allocates sending at the plan level — up to 500,000 emails/mo on Scale — instead of defaulting each account to 100 outbound per day. A busy agent doesn't hit an artificial daily ceiling.
Prompt-injection scanning. Every inbound email is scored for injection attempts before your agent reads it — "ignore previous instructions," embedded commands, and similar. When an agent acts autonomously on email, this matters.
A real dashboard. See every inbox, message, and webhook delivery in a visual dashboard on all plans — debugging an agent by tailing API responses gets old fast.
No sales call. Sign up, create 5 free inboxes, and ship today. Upgrade with a credit card when you outgrow free.
Where Nylas Agent Accounts Wins
Nylas is an established vendor and Agent Accounts is a serious product. It's the better choice when:
- Your agent needs calendar too. Agent Accounts bundles calendar with email in one identity. DSE is deliberately email-only — if scheduling is core to your agent, that bundle is genuinely convenient.
- You're an enterprise buyer. If your org wants an established vendor, a sales relationship, and a procurement motion, Nylas provides exactly that.
- The free tier covers you. For a small prototype, 3 accounts and 3,000 emails/mo free (as of August 2026) may be all you need — and if 7-day retention doesn't bother your use case, it's a fine sandbox.
For a broader look at Nylas beyond the retention and pricing angle, see our full Dead Simple Email vs Nylas comparison.
How to Switch from Nylas Agent Accounts
- Export anything you need from Nylas first. With a 7-day retention default (as of August 2026), older messages may already be gone — pull what remains before you cut over.
- Sign up for Dead Simple Email — free, no credit card, 5 inboxes immediately.
- Create an inbox per agent via the dashboard or API (bulk create if you have many).
- Point your agents at the REST API, or connect the MCP server for LLM-native access.
- Verify your sending domain — DSE guides the MX/SPF/DKIM/DMARC records.
- Keep Nylas for calendar if your agent uses it — DSE replaces the email side only.
Frequently Asked Questions
Dead Simple Email is the closest like-for-like alternative for the email side of Nylas Agent Accounts. It gives agents dedicated inboxes with persistent message storage (no 7-day retention default), transparent published pricing at $0, $5, $29, and $99 per month, a visual dashboard, and prompt-injection scanning on every inbound email — all self-serve, with no enterprise sales call.
As of August 2026, Nylas Agent Accounts defaults to a 7-day message retention window per agent account, alongside per-account defaults of 100 outbound emails per day and 1GB of storage. Dead Simple Email stores messages persistently — an agent can search and re-read its full history, which matters for long-running agents that use their inbox as memory.
As of August 2026, Nylas Agent Accounts offers a free tier with 3 agent accounts, 3,000 emails per month, and 3GB of storage, but does not publish enterprise pricing — scaling past the free tier means talking to sales. Dead Simple Email publishes its whole ladder: free (5 inboxes, 5,000 emails/mo), $5/mo (15 inboxes), $29/mo (100 inboxes), and $99/mo (500 inboxes).
Choose Nylas Agent Accounts if your agent needs calendar bundled with email as one identity, or if you are an enterprise buyer who wants an established vendor with a sales and procurement motion. Nylas reached general availability with Agent Accounts in June 2026 and bundles calendar in the same product; Dead Simple Email is deliberately email-only.
As of August 2026, Nylas Agent Accounts defaults each agent account to 100 outbound emails per day. Dead Simple Email allocates sending at the plan level — 5,000 emails per month free, up to 500,000 per month on the $99 Scale plan — so a busy agent isn't capped by a low per-account daily default.
Yes, for the email side. Sign up free (no credit card), create an inbox per agent via API or dashboard, point your agent at the REST API or MCP server, and verify your domain. Because Nylas retains messages for only 7 days by default as of August 2026, export anything you need from Nylas before you switch.