Mailscale

Freemium
·
Web

Free plan available
No credit card

What is Mailscale?

Mailscale gets you around the core bottleneck of cold email: the sending limits that kill single-account campaigns. Spin up and manage up to 1000 email accounts from one web dashboard, spreading sends across multiple accounts to dodge provider caps and keep deliverability high. There's a free tier for testing the approach before you commit to paid plans. The catch is complexity. Managing hundreds of accounts means serious compliance work, and email providers can still flag or restrict accounts they spot doing mass outreach. It's for B2B sales teams running aggressive prospecting, recruitment agencies sending bulk candidate outreach, or agencies handling cold email for multiple clients. If you're sending moderate volumes or can't resource multi-account compliance, a simpler platform makes more sense.

Key features

Email account generation

Create and manage up to 1000 email accounts for distributed sending

Multi-account management

Centralised dashboard to oversee multiple sender accounts

Cold email distribution

Send campaigns across different accounts to improve reach and deliverability

Freemium model

Access basic functionality without upfront payment

Integration capability

Connect with email sending platforms and CRM tools

Pros & cons

Advantages

Enables high-volume cold email campaigns without hitting single-account sending limits
Improves email deliverability by distributing sends across multiple accounts
Free tier allows testing before committing to paid plans
Useful for sales teams needing to scale outreach quickly

Limitations

Managing many email accounts increases complexity and compliance responsibilities
Email providers may restrict or flag accounts used for mass cold outreach
Requires careful attention to email marketing regulations and anti-spam laws in different regions