SpinUp Email vs AgentiSend

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

SpinUp Email compared with AgentiSend
Detail	SpinUp Email	AgentiSend
What it does	Business email without the bloat	Transactional email API with per-key budgets and guardrails for AI agents
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	US
Pricing model	Paid	Not given
Pricing	Standard Mailbox: $3.00 USD per mailbox/month (or $1.00/month billed annually). SpinUp Email Plus: $4.00 USD per mailbox/month (or $2.00/month billed annually). Archiving: $6.00 USD per mailbox/month (or $3.00/month billed annually). All plans backed by 30-day money-back guarantee. Save up to 67% wi	Not given
Key features	25 GB mailbox storage and 30 GB file storage IMAP, POP, and SMTP access Premium spam and virus protection ActiveSync across desktop and mobile Shared calendars and contacts MS Office-compatible apps Instant messaging Unlimited storage for archived email Advanced search capabilities 24x7x365 expert human support	Per-key send budgets enforced as emails are sent Approval queue for held and agent-requested sends Account-wide kill switch to pause all senders instantly Loop detection that holds suspicious repeated sends for review REST API and MCP server with identical operations Detailed email delivery logs with status and reasons DNS verification with copy-paste records and validation Bounce and complaint tracking per domain over rolling 7 days Batch sends up to 500 emails with per-item error reporting
What makes it different	Free and easy migrations from existing email providers 30-day money-back guarantee with no long-term contracts No data mining or ads 100% targeted uptime	Up to 75% cheaper than Resend on equivalent email volumes Error responses name the exact fix needed instead of just a code Resend-compatible API eliminates need to rewrite integration code
Community votes	0	0
DR (Domain Rating by Ahrefs)	13 −1 (down) since last check	33 no change since last check
Trust Flow (Majestic)	3	1
Citation Flow (Majestic)	23	30
Referring domains (Majestic)	22	31

3 details filled in for both companies.

More alternatives to SpinUp Email More alternatives to AgentiSend