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Email deliverability determines whether your messages reach the inbox or spam folder. These tools help you monitor, test, and improve your sender reputation.
Essential Deliverability Tools
Email Warmup
Gradually build sender reputation with automated engagement.
Spam Testing
Check emails against spam filters before sending.
Inbox Placement
Monitor where your emails actually land.
Blacklist Monitoring
Get alerts if domains or IPs get flagged.
Instantly.ai is a powerful cold email automation platform with unlimited email accounts, built-in warmup, AI-powered personalization, and a 160M+ B2B lead database.
Pricing
- Starter: $37
- Pro: $97
- Enterprise: $358
Key Features
- Unlimited Email Account Connections
- Automatic Email Warmup
- Campaign A/Z Testing
- Unibox Unified Inbox
- 160M+ B2B Lead Database
Pros
- Unlimited email accounts with flat pricing (no per-seat fees)
- Powerful built-in warmup system for deliverability
- Excellent value for high-volume senders
Cons
- Modular pricing requires separate purchases for CRM and Lead Finder
- Limited native third-party integrations
MailReach is a specialized email deliverability platform that warms up sender reputation, tests inbox placement, and provides AI-powered insights to keep cold emails out of spam.
Pricing
- Starter: $25
- Pro: $19.50
- Enterprise: $16
Key Features
- AI-Powered Email Warmup
- Spam Testing & Placement Tracking
- Co-Pilot Deliverability Assistant
- Email List Verifier
- Network of 20,000+ Real Inboxes
Pros
- Laser-focused on deliverability, not bloated with unrelated features
- Works with any SMTP provider (Gmail, Outlook, SendGrid, Amazon SES)
- Users report 137% average reply rate growth and 19% revenue increase
Cons
- No campaign sending or CRM features—warmup and testing only
- Costs add up fast when warming 10+ mailboxes without bundling
ManyReach is an AI-powered cold email platform with pay-as-you-go pricing, unlimited mailboxes, and advanced deliverability features designed for scaling outreach without restrictions.
Pricing
- Starter: $49
- Pro: $149
- Enterprise: $899
Key Features
- Unlimited Mailboxes & Contacts
- Unlimited Team Members & Workspaces
- Pay-As-You-Go Credit System
- Manywarm™ Email Warmup
- Advanced Sender Rotation
Pros
- Credits never expire - true pay-as-you-go flexibility
- Unlimited mailboxes, contacts, and team members
- Superior deliverability rates (up to 99% reported)
Cons
- Initial setup may have a learning curve
- Limited customer support responsiveness
Sequence-r is a straightforward B2B email outreach platform designed for sales professionals, offering automated sequences and free email warmup without unnecessary complexity.
Pricing
- Starter: £0
- Pro: £13
- Enterprise: £199
Key Features
- Automated Email Sequences
- Free Email Warmup Tool
- Multi-Project Management
- Team Collaboration
- Campaign Analytics & Tracking
Pros
- Simple, intuitive interface without bloated features
- Free forever plan with 400 emails/month included
- Built-in email warmup tool at no extra cost
Cons
- Limited advanced features compared to enterprise platforms
- No built-in lead database or email verification
Mailshake is an AI-powered sales engagement platform that automates email, LinkedIn, and phone outreach with advanced deliverability tools, helping 100,000+ companies scale personalized cold outreach campaigns.
Pricing
- Starter: $29
- Pro: $49
- Enterprise: $99
Key Features
- SHAKEspeare AI Email Writer
- Multi-Channel Outreach (Email, LinkedIn, Phone)
- Lead Catcher Dashboard
- Automated Follow-Up Sequences
- A/B Testing & Split Testing
Pros
- Exceptional deliverability with built-in warmup and DNS setup tools
- AI-powered email writer (SHAKEspeare) generates personalized copy quickly
- Easy to use with minimal learning curve - reps can send campaigns on day one
Cons
- No free trial available - payment required upfront
- Starter plan limited to 1 email address and 1,500 sends/month
Mailwarm is a Y Combinator-backed email warm-up tool that improves sender reputation and deliverability through automated engagement with 1000+ real inboxes.
Pricing
- Starter: $69
- Pro: $159
- Enterprise: $479
Key Features
- Automated Email Warm-up
- 1000+ Real Inbox Network
- Customizable Scheduling
- Blacklist Monitoring
- Deliverability Dashboard
Pros
- Simple and intuitive user interface
- Achieves 70%+ open rates for users
- Y Combinator-backed with proven track record
Cons
- Premium pricing compared to competitors
- No Zoho or native Gmail integration yet
Deliveryman AI is a managed cold email infrastructure platform that achieves 98% inbox delivery through automated subdomain distribution and reputation management.
Pricing
- Starter: $29
- Pro: $79
- Enterprise: $299
Key Features
- Multi-Subdomain Email Distribution
- Automated Domain Reputation Building
- 98% Inbox Delivery Rate
- Spam Rate Score (SRS) Monitoring
- Automatic Email Warmup
Pros
- Exceptional 98% inbox delivery rate achieved in testing
- No Google Workspace accounts needed, reducing setup costs
- Fully managed email infrastructure with automated scaling
Cons
- Requires 14-day domain warmup period before sending campaigns
- Limited to 15k emails per domain monthly
Klenty is an AI-powered sales engagement platform that automates multichannel outreach across email, phone, SMS, and LinkedIn to help B2B teams book more meetings and accelerate pipeline growth.
Pricing
- Starter: $50
- Pro: $70
- Enterprise: $99
Key Features
- AI-powered email personalization
- multi-channel sequences (email, phone, SMS, LinkedIn)
- parallel dialer (up to 350 calls/hour)
- power dialer with call recording
- email warmup and deliverability tools
Pros
- comprehensive multichannel outreach in one platform
- excellent customer support with 2.5-minute response times
- powerful AI features for personalization and research
Cons
- steep learning curve for advanced features
- occasional bugs with campaign execution
lemlist is an AI-powered sales engagement platform that automates multichannel outreach across email, LinkedIn, WhatsApp, and calls with a 600M+ lead database and built-in deliverability tools.
Pricing
- Starter: $69
- Pro: $99
- Enterprise: Custom
Key Features
- 600M+ B2B Lead Database
- AI-Powered Personalization
- Multichannel Sequences (Email, LinkedIn, WhatsApp, Calls)
- Smart Email Enrichment & Verification
- lemwarm Deliverability Booster
Pros
- All-in-one multichannel platform reducing tool sprawl
- Built-in email warmup included free with every seat
- Extensive 600M+ verified lead database with enrichment
Cons
- Pricing can be steep for solo founders and small teams
- Learning curve for advanced multichannel features
Saleshandy is an AI-powered cold email outreach platform with unlimited email accounts, 700M+ B2B lead database, and advanced deliverability tools to scale outreach campaigns.
Pricing
- Starter: $25
- Pro: $69
- Enterprise: $209
Key Features
- Unlimited Email Accounts
- 700M+ B2B Contact Database
- AI Sequence Copilot
- Unified Inbox Management
- Inbox Radar Placement Testing
Pros
- Unlimited email accounts at no additional cost
- All-in-one platform combining lead discovery, outreach, and inbox management
- 7-day free trial with no credit card required
Cons
- May require initial setup time for optimal deliverability configuration
- Advanced features can be overwhelming for complete beginners