Figuring out — and comparing — bulk email sender pricing is more complicated than it sounds.

Some email sending platforms charge by contacts. Others by number of emails. Some put limits on both. (There’s one that just gives you unlimited everything, but we’ll get there.)

Some have daily limits that’ll stop your campaign dead in its tracks.

Some are expensive up front, while some look cheap until you hit 50,000 emails and suddenly you’re paying 20x more per email than you started with.

So… I did the research.

I looked at a dozen of the most popular email sending platform4s — from legacy email marketing platforms to cold outreach specialists to Gmail-based mail merge tools — and calculated what you’d actually pay at 5,000, 10,000, 100,000, and 1,000,000 emails per month.

I broke down the costs two ways: One email per contact, and at a more normal sending volume.

Here’s a full breakdown of the costs — plus what you do and don’t get for each platform’s price.

Bulk Email Sender Pricing: Table of Contents

• 12 Top Email Platforms, Evaluated for Bulk Sending
  • GMass
  • Mailchimp
  • SendGrid
  • Instantly
  • YAMM (Yet Another Mail Merge)
  • Kit (formerly ConvertKit)
  • Mailmeteor
  • Smartlead
  • Brevo (formerly SendinBlue)
  • Mailsuite
  • Sender
  • Klaviyo
• Why GMass Is the Clear Pick for Bulk Email Sender Pricing

12 Top Email Platforms, Evaluated for Bulk Sending

For this list, I picked the platforms that show up most often when people are researching bulk email options. (Whether that’s in Google, G2, Capterra, or getting recommendations from LLMs.)

Also, note, I’m breaking this down by the month-to-month cost, not the annual plan. I also looked for the least expensive plan at each sending volume.

GMass

Scenario 1: One email per contact per month

• 5,000 emails: $25/month (Standard plan)
• 10,000 emails: $25/month (Standard plan)
• 100,000 emails: $45/month (Standard plan + SMTP) or $55/month (Professional plan)
• 1,000,000 emails: $55/month (Professional plan) or $124-$425/month (Standard plan + SMTP)

Scenario 2: Realistic email frequency (~4-10 emails per contact per month)

• 5,000 emails: $25/month (Standard plan)
• 10,000 emails: $25/month (Standard plan)
• 100,000 emails: $45/month (Standard plan + SMTP) or $55/month (Professional plan)
• 1,000,000 emails: $55/month (Professional plan) or $124-$425/month (Standard plan + SMTP)

View GMass pricing →

I’m not going to mess around here. We’ll start with the cheapest option by far.

GMass is the only platform on this list — and quite possible in the entire email sending world — with true unlimited pricing.

That’s why those two price breakdown lists above are identical.

You pay $25/month for the Standard plan and can send as many emails as you want to as many contacts as you want until you hit Gmail’s sending limits (~2,000/day for Google Workspace accounts).

Want to send more than those ~60,000 emails? You can either use a SMTP server to handle the overage (billed by GMass at $4/10,000 emails) or use MultiSend on GMass’s Professional plan instead at no extra cost.

What you get

• Unlimited emails, contacts, and campaigns
• Full Gmail integration that lets you send Gmail mail merge campaigns directly from your inbox
• Built for any use case: Marketing emails, cold outreach, mail merge, internal comms, even personal emails
• Auto follow-ups
• Advanced deliverability tools like Spam Solver and unlimited free email verification
• Real-time tracking
• Ability to break Gmail’s sending limits
• Tons of other features, from A/B testing to advanced scheduling

The trade-off

• GMass requires Gmail and doesn’t work for Outlook or others
• GMass is a Chrome extension that transforms Gmail into an email sending platform, so it’s desktop-only
• No drag-and-drop email template builder

Mailchimp

Scenario 1: One email per contact per month

• 5,000 emails: $100/month (Standard plan)
• 10,000 emails: $135/month (Standard plan)
• 100,000 emails: $680/month (Standard plan)
• 1,000,000 emails: Several thousand dollars estimated (Premium plan, need to get in touch for info)

Scenario 2: Realistic email frequency (~4-10 emails per contact per month)

• 5,000 emails: $45/month (Standard plan, 1,500 contacts × 3-4 emails/month)
• 10,000 emails: $60/month (Standard plan, 2,500 contacts × 4 emails/month)
• 100,000 emails: $310/month (Standard plan, 25,000 contacts × 4 emails/month)
• 1,000,000 emails: $800/month (Standard plan, 100,000 contacts × 10 emails/month)

View Mailchimp pricing →

Mailchimp’s pricing means your costs depend heavily on your number of contacts.

If you email your list weekly plus send monthly newsletters (4 times/month), you’ll pay less more than someone who emails a large group of people just once a month.

The rub with Mailchimp is it starts really cheap — but then the costs skyrocket quickly the more your list grows. It’s why there are so many people every day searching for Mailchimp alternatives.

What you get

• Well-known platform with lots of integrations
• Great templates and template customization
• Comprehensive reporting

The trade-off

• Not made for cold outreach, mail merge, internal comms, or any other non-marketing uses
• Contact-based pricing that includes unsubscribed users
• Costs spiral quickly as your list grows
• Any advanced features require going up to higher tier plans

SendGrid

Scenario 1: One email per contact per month

• 5,000 emails: $15/month (Basic 5k plan)
• 10,000 emails: $25/month (Basic 10k plan)
• 100,000 emails: $200/month (Basic 100k plan)
• 1,000,000 emails: Several thousand dollars estimated (Custom plan, need to get in touch for info)

Scenario 2: Realistic email frequency (~4-10 emails per contact per month)

• 5,000 emails: $15/month (Basic 5k plan, 1,500 contacts × 4 emails/month)
• 10,000 emails: $15/month (Basic 5k plan, 2,500 contacts × 4 emails/month)
• 100,000 emails: $120/month (Basic 50k plan, 25,000 contacts × 4 emails/month)
• 1,000,000 emails: $900/month (Basic 200k plan, 100,000 contacts × 10 emails/month)

View SendGrid pricing →

SendGrid is an SMTP provider focused more on transactional emails than other types of messages — though they do have some email sending options, which I’ve detailed above.

It offers solid value at lower volumes but requires far more technical setup than traditional email marketing platforms.

In most cases, SendGrid works better when you use it as an SMTP service paired with a real email sending platform — as you’ll find a ton of features missing from SendGrid’s offering.

What you get

• Dedicated IPs on higher plans
• Both transactional and marketing email capabilities
• Robust API
• Detailed analytics

The trade-off

• Most key features missing
• Steeper learning curve
• Developer-focused interface; you’ll need technical knowledge to get the most out of it

Instantly

Scenario 1: One email per contact per month

• 5,000 emails: $97/month (Hypergrowth plan)
• 10,000 emails: $97/month (Hypergrowth plan)
• 100,000 emails: $358/month (Light Speed plan)
• 1,000,000 emails: Several thousand dollars estimated (Custom plan, need to get in touch for info)

Scenario 2: Realistic email frequency (~4-10 emails per contact per month)

• 5,000 emails: $97/month (Hypergrowth plan, 1,500 contacts × 4 emails/month)
• 10,000 emails: $97/month (Hypergrowth plan, 2,500 contacts × 4 emails/month)
• 100,000 emails: $97/month (Hypergrowth plan, 25,000 contacts × 4 emails/month)
• 1,000,000 emails: Several thousand dollars estimated (Custom plan, need to get in touch for info)

View Instantly pricing →

Instantly is built for hardcore cold emailers, and the pricing reflects that focus. You’ll also need to factor in the cost of multiple domains, email accounts, and potentially email infrastructure services, which can add hundreds more per month to these prices.

What you get

• Automated warm-up (though this is a violation of Google’s policies, so be careful)
• Unified inbox management
• Optional add-on services for a CRM or to buy leads

The trade-off

• For extensive cold outreach only (not for email marketing or mail merge)
• Requires significant technical setup with multiple domains
• Limits on contacts

YAMM (Yet Another Mail Merge)

Scenario 1: One email per contact per month

• 5,000 emails: $36/year ($3/month) (Personal plan)
• 10,000 emails: $60/year ($5/month) (Professional plan)
• 100,000 emails: Not possible (max 1,500/day = ~45K/month)
• 1,000,000 emails: Not possible

Scenario 2: Realistic email frequency (~4-10 emails per contact per month)

• 5,000 emails: $36/year ($3/month) (Personal plan)
• 10,000 emails: $60/year ($5/month) (Professional plan)
• 100,000 emails: Not possible (max 1,500/day = ~45K/month)
• 1,000,000 emails: Not possible

View YAMM pricing →

YAMM looks incredibly cheap at first glance, but those daily limits will kill any serious mass email campaign.

The Personal plan caps you at 400 emails per day and only works with gmail.com accounts; the Professional plan allows 1,500 emails per day with Google Workspace. Do the math: even on the highest plan, you’re looking at roughly 45,000 emails per month maximum.

Gmail has a built-in rudimentary mail merge tool, and while YAMM is a slight step up from that, neither is really made for high-volume or professional emailers.

What you get

• The cheapest option for small-scale mail merge
• Basic email tracking
• Basic scheduling features

The trade-off

• Extremely limited daily sending quotas
• No automation sequences
• Extremely basic tracking
• Zero deliverability tools
• No way to scale beyond Gmail’s built-in limits

Kit (formerly ConvertKit)

Scenario 1: One email per contact per month

• 5,000 emails: Free (Free plan, 5,000 subscribers)
• 10,000 emails: Free (Free plan, 10,000 subscribers)
• 100,000 emails: $679/month (Creator plan, 100,000 contacts)
• 1,000,000 emails: Several thousand dollars estimated (Creator Pro plan, need to get in touch for info)

Scenario 2: Realistic email frequency (~4-10 emails per contact per month)

• 5,000 emails: Free (Free plan, 1,500 contacts × 3-4 emails/month)
• 10,000 emails: Free (Free plan, 2,500 contacts × 4 emails/month)
• 100,000 emails: $199/month (Creator plan, 25,000 contacts × 4 emails/month)
• 1,000,000 emails: $679/month (100,000 contacts × 10 emails/month)

View Kit pricing →

Kit is an interesting pricing case. It’s free as long as your list is small — then takes a massive jump in price once your list grows (or you want to use their advanced features).

What you get

• Unlimited emails on paid plans
• Creator-focused features like commerce integration, simple automation workflows, and landing page builders

The trade-off

• Not made for cold outreach, mail merge, internal comms, or any other non-marketing uses
• Very expensive per-contact pricing
• Limited design templates
• Fewer integrations than competitors, and pricing that makes large lists financially prohibitive

Mailmeteor

Scenario 1: One email per contact per month

• 5,000 emails: $5/month (Starter plan)
• 10,000 emails: $13/month (Premium plan)
• 100,000 emails: Not feasible (Pro plan caps at 45,000 emails/month)
• 1,000,000 emails: Not feasible

Scenario 2: Realistic email frequency (~4-10 emails per contact per month)

• 5,000 emails: $5/month (Starter plan)
• 10,000 emails: $13/month (Premium plan)
• 100,000 emails: Not feasible (Pro plan caps at 45,000 emails/month)
• 1,000,000 emails: Not feasible

View Mailmeteor pricing →

Mailmeteor is a step up from YAMM in terms of features, but you’re still constrained by Gmail’s limits of up to 2,000 recipients per day (and Mailmeteor doesn’t have any option to break those limits).

Like YAMM, Mailmeteor is meant for smaller campaigns but hits a wall when you need to scale.

Also note: Their plans limit your number of campaigns. The Starter plan includes only 10 campaigns/month and the Premium plan stops at 25 campaigns.

What you get

• Works with Gmail or Outlook
• Some automation offered on most expensive plans
• A more polished interface than YAMM

The trade-off

• Limits your number of campaigns
• Limited by daily sending caps with no way to break Gmail sending limits
• Lacks advanced automation features that serious email marketers need
• Many features only available in the most expensive plan, including auto follow-ups, bounce and reply detection, email verification, and custom tracking domains

Smartlead

Scenario 1: One email per contact per month

• 5,000 emails: $94/month (Pro plan)
• 10,000 emails: $94/month (Pro plan)
• 100,000 emails: $174+/month (Custom plan; expect it to be way more than $174/month at this volume)
• 1,000,000 emails: $174+/month (Custom plan; expect it to be way WAY more than $174/month at this volume)

Scenario 2: Realistic email frequency (~4-10 emails per contact per month)

• 5,000 emails: $39/month (Basic plan, 1,500 contacts × 3-4 emails/month)
• 10,000 emails: $94/month (Pro plan, 2,500 contacts × 4 emails/month)
• 100,000 emails: $94/month (Pro plan, 25,000 contacts × 4 emails/month)
• 1,000,000 emails: $174+/month (Custom plan, 100,000 contacts × 10 emails/month; expect it to be way more than $174/month at this volume)

View Smartlead pricing →

Smartlead is another of the services that’s only a fit for hardcore cold emailers.

Much like Instantly, the Smartlead pricing is only scratching the surface of your costs once you start factoring in tons of domains, mailboxes, and infrastructure services.

What you get

• AI warm-up (again, be careful, as this violates Google’s policies)
• Unified inbox
• Multi-channel outreach (email, LinkedIn, SMS)

The trade-off

• For cold outreach only (not for email marketing or mail merge)
• Requires significant technical setup with multiple domains
• Limits on contacts
• Expensive if you’re doing client management

Brevo (formerly SendinBlue)

Scenario 1: One email per contact per month

• 5,000 emails: $41/month (Starter plan, unlimited contacts, 5,000 emails, Brevo branding removed)
• 10,000 emails: $41/month (Starter plan, unlimited contacts, 10,000 emails, Brevo branding removed)
• 100,000 emails: $81/month (Starter plan, unlimited contacts, 100,000 emails, Brevo branding removed)
• 1,000,000 emails: $669/month (Business plan, unlimited contacts, 1,000,000 emails)

Scenario 2: Realistic email frequency (~4-10 emails per contact per month)

• 5,000 emails: $29/month (Starter plan, 1,500 contacts × 3-4 emails/month, Brevo branding removed)
• 10,000 emails: $31/month (Starter plan, 2,500 contacts × 4 emails/month, Brevo branding removed)
• 100,000 emails: $81/month (Starter plan, 25,000 contacts × 4 emails/month, Brevo branding removed)
• 1,000,000 emails: $669/month (Business plan, 100,000 contacts × 10 emails/month)

View Brevo pricing →

For a pretty basic email marketing platform, Brevo is remarkably expensive.

As noted above, they charge an extra $12/month for you not to have Brevo add their branding to your email signature.

What you get

• No daily sending limit
• Automations (though to limited contacts)
• Segmentation

The trade-off

• Cannot be used for cold outreach, mail merge, internal comms, or any other non-marketing uses
• Standard plan is missing a ton of basic features, including things like A/B testing
• Pricing doesn’t scale well
• Limited automation capabilities

Mailsuite

Scenario 1: One email per contact per month

• 5,000 emails: $10/month (Advanced plan)
• 10,000 emails: $10/month (Advanced plan)
• 100,000 emails: Not feasible (plans stop at 60,000 emails/month)
• 1,000,000 emails: Not feasible

Scenario 2: Realistic email frequency (~4-10 emails per contact per month)

• 5,000 emails: $10/month (Advanced plan)
• 10,000 emails: $10/month (Advanced plan)
• 100,000 emails: Not feasible (plans stop at 60,000 emails/month)
• 1,000,000 emails: Not feasible

View Mailsuite pricing →

Mailsuite is primarily an email tracking tool that has token email sending offering; it’s not a true bulk email platform.

It’s strong on tracking individual emails but wasn’t built for large-scale campaigns.

What you get

• Pretty low prices
• Excellent email tracking and analytics
• Gmail integration

The trade-off

• Limited bulk sending capabilities
• No advanced automation
• Lacks deliverability optimization
• Missing campaign management features that most email marketers need

Sender

Scenario 1: One email per contact per month

• 5,000 emails: $33/month (Standard plan)
• 10,000 emails: $57/month (Standard plan)
• 100,000 emails: $367/month (Standard plan)
• 1,000,000 emails: Several thousand dollars estimated (Enterprise plan, need to get in touch for info)

Scenario 2: Realistic email frequency (~4-10 emails per contact per month)

• 5,000 emails: $19/month (Standard plan, 1,500 contacts × 3-4 emails/month)
• 10,000 emails: $19/month (Standard plan, 2,500 contacts × 4 emails/month)
• 100,000 emails: $117/month (Standard plan, 25,000 contacts × 4 emails/month)
• 1,000,000 emails: $367/month (Standard plan, 100,000 contacts × 10 emails/month)

View Sender pricing →

I didn’t include Sender’s free plan because it requires Sender branding, which is a nonstarter for most people. But with their free plan you can send up to 15,000 emails a month to up to 2,500 subscribers.

Otherwise, as you see, at low volumes Sender is pretty affordable — but at bulk volumes the prices start flying upwards.

What you get

• SMS marketing included
• Automation workflows
• User-friendly interface that’s easier than most enterprise platforms

The trade-off

• Cannot be used for cold outreach, mail merge, internal comms, or any other non-marketing uses
• Fewer advanced features compared to premium platforms
• Limited integrations
• The interface can feel basic compared to other design-focused platforms

Klaviyo

Scenario 1: One email per contact per month

• 5,000 emails: $100/month (Email plan)
• 10,000 emails: $150/month (Email plan)
• 100,000 emails: $1,380/month (Email plan)
• 1,000,000 emails: Several thousand dollars estimated (Email plan, need to get in touch for info)

Scenario 2: Realistic email frequency (~4-10 emails per contact per month)

• 5,000 emails: $45/month (Email plan, 1,500 contacts × 3-4 emails/month)
• 10,000 emails: $60/month (Email plan, 2,500 contacts × 4 emails/month)
• 100,000 emails: $400/month (Email plan, 25,000 contacts × 4 emails/month)
• 1,000,000 emails: $1,380/month (Email plan, 100,000 contacts × 10 emails/month)

View Klaviyo pricing →

Klaviyo is the biggest name in eCommerce email marketing. They made some pricing changes in 2025 where they’re now charging based on “active profiles” rather than send volume, which can significantly increase costs if you’re a store with a large but less-engaged list.

What you get

• Advanced eCommerce integrations
• Segmentation and automation
• SMS marketing integration
• Features specifically built for online stores

What you don’t

• Not made for sending anything but eCommerce marketing emails
• Expensive scaling with new “active profile” billing model
• Complexity that can overwhelm smaller businesses
• Costs that can quickly spiral for large lists

Why GMass Is the Clear Pick for Bulk Email Sender Pricing

Looking at all these numbers, GMass’s pricing model destroys the rest of the field for sending bulk emails, especially at higher volumes.

The math alone tells the story better than I can.

At 100,000 emails per month:

• GMass: $45/month
• Brevo: $81/month
• Smartlead: $94/month
• Instantly: $97/month
• Sender: $117/month
• SendGrid: $120/month
• Kit: $199/month
• Mailchimp: $310/month
• Klaviyo: $400/month
• YAMM: Not possible
• Mailmeteor: Not possible
• Mailsuite: Not possible

At 100,000 emails per month, GMass is around half the price of the closest other option.

At 1,000,000 emails per month:

• GMass: $55/month or $124/month with SMTP
• Sender: $367/month
• Brevo: $669/month
• Kit: $679/month
• Mailchimp: $800/month
• SendGrid: $900/month
• Klaviyo: $1,380/month
• Instantly: Several thousand dollars estimated
• Smartlead: Several thousand dollars estimated
• YAMM: Not possible
• Mailmeteor: Not possible
• Mailsuite: Not possible

At 1,000,000 emails per month, GMass is either 3x or 7x cheaper than the next closest option, depending on your volume sending preference.

And if you’re looking to send high volumes through Gmail, GMass is your only option. Most of the other Gmail senders simply can’t handle serious email volume:

• YAMM: Maxes out at ~45,000 emails/month due to daily limits
• Mailmeteor: Capped by Gmail’s 2,000 recipients/day limit
• Mailsuite: Not designed for bulk sending at all

Meanwhile, the platforms that can handle volume charge exponentially more as you scale.

Beyond pricing, GMass gives you everything and more that you find in the more expensive platforms.

Gmail integration: Send mail merge campaigns directly from your Gmail inbox using Google Sheets. Your campaigns look like personal emails because they are personal emails.

Break Gmail’s limits (legally): While other Gmail-based tools are stuck with Gmail’s 500- to 2,000-email daily limits, GMass can integrate with SMTP services or use inbox rotation to send unlimited emails while keeping the Gmail interface with which you’re comfortable.

Advanced deliverability tools: Spam Solver tests your campaigns on real inboxes and gives you AI-powered advice to improve your inbox rates. Most platforms charge extra for deliverability tools like Spam Solver; GMass includes it.

Real automation: Set up sophisticated follow-up sequences, A/B testing, and conditional logic.

Unlimited everything: Unlimited emails, unlimited contacts, unlimited campaigns. No arbitrary limits designed to force you to upgrade to a higher tier.

Bottom line: At any bulk sending volume above 10,000 emails/month, GMass isn’t just cheaper — it’s dramatically cheaper while offering more features than platforms costing 10-100x more.

And even if you’re sending lower volumes, it’s still a fantastic deal.

Ready to see why nearly 400,000 users have given GMass an average rating of 4.8 out of 5 stars?

You can try GMass free with no credit card required. Just install the Chrome extension and you’ll be sending your first bulk campaign in minutes.