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SPECIFICTION
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GridInbox

gridinbox.com

From $19/mo Free plan WebAPI
Visit gridinbox.com
Spec score 8.0 #12 of 23 in Email Alias Services

What it is

GridInbox is a shared email workspace for handling customer conversations sent to business addresses such as support@, sales@, and billing@. Team members can assign conversations, see who is handling them, and send or reply from the address where a message arrived. Its REST API can create and delete aliases, read messages, and send email programmatically. GridInbox also extracts one-time passwords and verification codes from incoming email for access through its dashboard or API. The Free plan costs nothing and includes five aliases, 10 outbound and 50 inbound messages per month, 512MB of storage, a 5 MiB attachment limit, and REST API access. Pro costs $19 a month and includes unlimited aliases, OTP extraction, 5GB storage, and up to three custom domains. Team costs $99 a month and includes five seats with role-based access control and up to 10 custom domains. GridInbox is designed for transactional and operational email; bulk marketing email is prohibited. It runs on the web and offers API access.

Spec sheet

Product
GridInbox is a shared email workspace for managing customer conversations across business addresses such as support@, sales@, and billing@.Read 4 Oct 2026 · gridinbox.com
Intended users
The maker describes use cases including e-commerce operations, QA automation, agencies, and solopreneurs.Read 4 Oct 2026 · gridinbox.com
Security
The privacy policy says data in transit uses TLS 1.2 or higher and email content, attachments, and sensitive user data at rest use AES-256 encryption.Read 4 Oct 2026 · gridinbox.com
Support
The FAQ directs users to contact the team by email for questions.Read 4 Oct 2026 · gridinbox.com
Headquarters
Sheridan, Wyoming, USARead 28 Sep 2026 · gridinbox.com
Company
The site identifies the maker as Quanta Flow Inc., Sheridan, Wyoming.Read 4 Oct 2026 · gridinbox.com
Access controls
Team plan includes up to five seats with role-based access control and per-inbox permissions.Read 4 Oct 2026 · gridinbox.com
Automation
Its REST API can create and delete aliases, read messages, and send email programmatically.Read 4 Oct 2026 · gridinbox.com
Custom domains
Pro supports up to 3 custom domains and Team supports up to 10; Free uses GridInbox system domains.Read 4 Oct 2026 · gridinbox.com
Data location
The privacy policy says primary data is stored in AWS US-East-1 in Northern Virginia.Read 4 Oct 2026 · gridinbox.com
Email use limit
GridInbox is designed for transactional and operational email and prohibits bulk marketing emails.Read 4 Oct 2026 · gridinbox.com
OTP extraction
GridInbox automatically extracts one-time passwords and verification codes from incoming email for access through the dashboard or REST API.Read 4 Oct 2026 · gridinbox.com
Team workflow
The workspace supports assigning conversations, showing who is handling them, and replying from the appropriate business address.Read 4 Oct 2026 · gridinbox.com
Two-way aliases
Users can receive mail at an alias and send or reply from that same address.Read 4 Oct 2026 · gridinbox.com

Plans and prices

Free (Starter) Free 10 outbound/mo · 50 inbound/mo · 5 aliases · 512MB storage · 5 MiB attachment limit · REST API access Read 4 Oct 2026 · gridinbox.com
Pro $19 a month 10,000 outbound · 50,000 inbound · unlimited aliases · 5GB storage · 3 custom domains · REST API access · OTP auto-extraction · 7-day free trial Read 4 Oct 2026 · gridinbox.com
Team $99 a month 100k outbound · 500k inbound · unlimited aliases · 50GB storage · 10 custom domains · 5 seats with RBAC · high-frequency REST API access Read 4 Oct 2026 · gridinbox.com

Every GridInbox plan and price →

Strong points and limits

Strong points

  • Assigns conversations and shows who handles them
  • Supports sending and replies from aliases
  • REST API can manage aliases and email
  • Extracts incoming one-time passwords
  • Free plan includes REST API access

Limits

  • Free plan limits outbound mail to 10 monthly
  • Free plan limits inbound mail to 50 monthly
  • Bulk marketing email is prohibited
  • Free plan uses GridInbox system domains

Who it suits

GridInbox suits e-commerce operations, QA automation, agencies, and solopreneurs handling operational email. Teams that need shared inbox assignments or programmatic alias and message management may find its workflow relevant.

Verdict

GridInbox combines shared conversation handling with API access and verification-code extraction. Its usage limits and prohibition on bulk marketing make the intended email workload important to consider.

Where Specifiction places it

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