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About

GrowZen is an all-in-one cold email OS for growth marketers, combining lead intelligence, multi-Gmail and SMTP sending, campaign management, warmup, verification, mail tracking, and real-time analytics in one platform. It is powered by Zen, a business-aware assistant that understands the user’s business and supports outreach workflows across scraping, verification, campaign execution, inbox management, copy creation, market research, and optimization. GrowZen includes native lead intelligence, multi-source scraping from maps, search, and websites, a 3-layer email verification system covering syntax, MX, and DMARC, and multi-account sending with inbox rotation, smart follow-ups, warmup health monitoring, and safe outreach limits. Its desktop infrastructure is session-stable and built as a native app rather than only a browser extension, with encrypted credential storage, local data encryption, multi-profile isolation, and automation running on the user’s machine.

About

SubsiMail is a self-hosted cold email sequencing platform. Prospect lists, templates, connected inboxes, and all campaign data live in your own database, not a third-party SaaS. It's built as a self-hosted alternative to Instantly, Smartlead, lemlist, and Apollo, with flat per-inbox pricing instead of per-seat fees, full data ownership and export, no content review, and no third-party access to your contacts or campaigns. Runs as a single Docker container on any $5 VPS. Connect Gmail, Outlook, or any SMTP/IMAP inbox; build multi-step sequences with merge fields and reply detection; manage per-user roles (admin/manager/view-only) with a full audit trail; and integrate via a REST API with personal API keys. The first connected mailbox is free forever.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

Growth marketers, outbound sales teams, and agencies that need one system to scrape leads, verify emails, run cold-email campaigns, warm up inboxes, and optimize outreach performance

Audience

Sales teams, agencies, recruiters, and solo founders running cold email outreach who want to own their data instead of trusting a third-party SaaS with their prospect lists.

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

No images available

Pricing

$8.99 per month
Free Version
Free Trial

Pricing

Free (paid plans from $49/mo)
Free Version
Free Trial

Reviews/Ratings

Overall 5.0 / 5
ease 4.0 / 5
features 5.0 / 5
design 5.0 / 5
support 4.0 / 5

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

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Pros & Cons from Real Users

Pros

  • I use it for my campaign automation for weeks or even months. And its webhooks and MCP connection allow me to control it as I want and connect it to my existing scan. Its MCP connection makes everything too easy for me to manage with my Claude AI.

Cons

  • There was an issue in the early stage that the team fixed in a day. But it will not be a concern because the platform clearly says that it is in an early-stage beta and bugs can be expected.

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

GrowZen
Pakistan
www.growzen.app/

Company Information

SubsiMail
Founded: 2026
India
subsimail.com

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Categories

Categories

Integrations

Gmail
Microsoft Outlook

Integrations

Gmail
Microsoft Outlook
Claim GrowZen and update features and information
Claim GrowZen and update features and information
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