GMass vs Reply.io: Cold Email Platform Comparison
Compare GMass and Reply.io side by side. See pricing, features, and integrations to choose the right cold email platform for your needs.
GMass starts at $30/month and operates inside Gmail with unlimited emails, contacts, and campaigns. Reply.io starts at $49/month and provides unlimited email warmup, access to 1 billion B2B contacts, and AI SDR capabilities. GMass suits budget-conscious teams preferring Gmail integration, while Reply.io fits organizations needing multichannel outreach and built-in contact databases.
Key takeaways
- GMass costs $30/month for its Standard plan versus Reply.io's $49/month Email Volume plan, making GMass 39% less expensive at entry level.
- Reply.io includes a database of 1 billion B2B contacts and unlimited email warmup, features GMass does not offer.
- GMass operates entirely inside Gmail and offers unlimited contacts and campaigns across all pricing tiers.
- Reply.io integrates with 9 platforms including HubSpot, Salesforce, and Pipedrive, while GMass focuses on 4 Google-centric integrations.
- GMass was founded in 2015 and provides free email verification, while Reply.io offers a 14-day free trial and AI personalization.
Reviewed and updated February 6, 2026
GMass vs Reply.io: Cold Email Platform Comparison
GMass and Reply.io compete head-to-head in the cold email outreach space. This guide compares their pricing tiers, feature sets, and integration ecosystems to help you make a confident decision.
The Quick Answer
GMass stands out with works inside gmail and unlimited emails, contacts, and campaigns. Reply.io differentiates itself through unlimited email warmup and 1 billion b2b contacts database.
GMass offers a lower entry point at $30/mo compared to Reply.io at $49/mo.
If your priority is sending campaigns that land in the inbox and generate replies, both tools can deliver. The right choice depends on your budget, team size, and the specific capabilities you need most.
Understanding the Core Difference
GMass is Gmail-based mass email and mail merge platform with unlimited emails, campaigns, and contacts directly inside Gmail.
Reply.io is AI-powered sales engagement platform with 1B+ B2B contacts, multichannel sequences, and AI SDR capabilities.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
GMass Pricing (as of February 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Standard | $30/mo | Unlimited | Unlimited (Gmail limits apply) |
| Premium | $40/mo | Unlimited | Unlimited (Gmail limits apply) |
| Professional | $60/mo | Unlimited | Unlimited (Gmail limits apply) |
| Teams (5 users) | $175/mo | Unlimited | Unlimited (Gmail limits apply) |
Source: GMass Pricing
Reply.io Pricing (as of February 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Email Volume | $49/mo | 1,000 active contacts | Unlimited |
| Multichannel | $89/mo | Unlimited | Unlimited |
| Agency | $166/mo | Custom | Unlimited |
| AI SDR | $259/mo | Custom | Unlimited |
Source: Reply.io Pricing
Pricing Analysis
GMass is more affordable at the entry level ($30/mo vs $49/mo). For teams with tight budgets or those just getting started with cold email outreach, this price difference matters.
Features Breakdown
GMass Key Features
- Works inside Gmail
- Unlimited emails, contacts, and campaigns
- Mail merge personalization
- Free email verification
- Automated follow-up sequences
- A/B testing
- Spam Solver deliverability tool
- Custom tracking links
- Inbox rotation
- API and Zapier access
Reply.io Key Features
- Unlimited email warmup
- 1 billion B2B contacts database
- Anti-spam & deliverability suite
- LinkedIn automation (add-on)
- SMS and calls (add-on)
- AI personalization
- AI SDR capabilities
- Multi-workspace for agencies
- 14-day free trial
Unique to GMass
- Works inside Gmail
- Unlimited emails, contacts, and campaigns
- Mail merge personalization
- Free email verification
- Automated follow-up sequences
- A/B testing
- Spam Solver deliverability tool
- Custom tracking links
- Inbox rotation
- API and Zapier access
Unique to Reply.io
- Unlimited email warmup
- 1 billion B2B contacts database
- Anti-spam & deliverability suite
- LinkedIn automation (add-on)
- SMS and calls (add-on)
- AI personalization
- AI SDR capabilities
- Multi-workspace for agencies
- 14-day free trial
Integration Ecosystem
GMass Integrations
GMass connects with: Gmail, Google Sheets, Zapier, Google Workspace.
Reply.io Integrations
Reply.io connects with: HubSpot, Salesforce, Pipedrive, Copper CRM, Zendesk Sell, Close, Zapier, Make, n8n.
Shared Integrations
Both tools integrate with: Zapier.
GMass exclusively offers: Gmail, Google Sheets, Google Workspace.
Reply.io exclusively offers: HubSpot, Salesforce, Pipedrive, Copper CRM, Zendesk Sell, Close, Make, n8n.
Use Case Recommendations
Best Fit for GMass
- Budget-conscious teams looking for an affordable cold email platform
- Teams that need a wide feature set (10 capabilities listed)
- Sales teams running high-volume outbound email campaigns
- Agencies managing multiple client outreach programs
Best Fit for Reply.io
- Budget-conscious teams looking for an affordable cold email platform
- Organizations with complex tech stacks needing broad integration support (9 integrations)
- Sales teams running high-volume outbound email campaigns
- Agencies managing multiple client outreach programs
Feature Comparison Summary
| Feature | GMass | Reply.io |
|---|---|---|
| Starting Price | $30/mo | $49/mo |
| Top Tier Price | $175/mo | $259/mo |
| Total Features Listed | 10 | 9 |
| Integrations | 4 | 9 |
| Founded | 2015 | N/A |
Getting Started Checklist
- Define your cold email outreach requirements and monthly budget
- Estimate your expected email sending volume to find the right tier
- List the integrations your team currently relies on
- Sign up for free trials or demos of both platforms
- Run a small test with each tool before making a commitment
- Evaluate the onboarding experience and support quality
Final Thoughts
GMass and Reply.io both serve the cold email outreach market well. GMass offers a more accessible entry point at $30/mo, while Reply.io starts at $49/mo. Your decision should weigh pricing against the specific features that matter most for your workflow.
Start with a trial of each to see which platform fits your team's daily process. The best tool is the one your team actually uses consistently.
Related Reading
- Best GMass Alternatives in 2026
- Best Reply.io Alternatives in 2026
- GMass vs Instantly: Cold Email Platform Comparison
- GMass vs Smartlead: Cold Email Platform Comparison
- Instantly vs Reply.io: Which Cold Email Platform Fits Your Outreach Strategy?
Pricing and features verified as of February 2026. Visit GMass and Reply.io for current information.
Frequently asked questions.
Frequently asked questions- Which is cheaper, GMass or Reply.io?
- GMass is cheaper with a starting price of $30/month compared to Reply.io's $49/month entry plan. GMass's most expensive team plan costs $175/month for 5 users, while Reply.io's top AI SDR tier reaches $259/month. The price difference is most significant at entry level where GMass costs $19 less per month.
- Does GMass or Reply.io work better with Gmail?
- GMass works entirely inside Gmail as a native extension, allowing you to send campaigns directly from your Gmail inbox with unlimited contacts and campaigns. Reply.io operates as a standalone platform outside Gmail but integrates with it for sending. If you want to stay within Gmail's interface, GMass is the better choice.
- Which platform has better CRM integrations?
- Reply.io offers significantly more CRM integrations with 9 connections including HubSpot, Salesforce, Pipedrive, Copper CRM, Zendesk Sell, and Close. GMass focuses on 4 Google-centric integrations: Gmail, Google Sheets, Google Workspace, and Zapier. For diverse tech stack compatibility, Reply.io provides broader integration support.
- Does Reply.io include a contact database?
- Yes, Reply.io includes access to a database of 1 billion B2B contacts, which GMass does not offer. This built-in prospecting database allows Reply.io users to find leads directly within the platform. GMass requires you to bring your own contact lists or source them externally through Google Sheets or other tools.
- Which tool is better for email deliverability?
- Both platforms address deliverability differently. Reply.io includes unlimited email warmup and an anti-spam deliverability suite across its plans. GMass offers its Spam Solver deliverability tool, inbox rotation, and free email verification. Reply.io's unlimited warmup gives it an edge for teams prioritizing inbox placement from the start.
About the author.
Tim Carden is CMO / CTO at RevenueFlow, which builds and operates outbound revenue engines for B2B companies. Studied at McGill University.
Tim Carden · CMO / CTO
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