Inboxy vs Instantly: Email Warmup Tool vs Cold Email Platform Comparison
Compare Inboxy (email warmup tool) and Instantly (cold email platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Inboxy is an email warmup tool for improving domain reputation and inbox placement, while Instantly is a cold email platform for sending outreach campaigns. Both start at $47/mo. Inboxy offers one pricing tier with 9 listed features, while Instantly offers four tiers with 8 listed features and 450M+ B2B leads. Many teams use both.
Key takeaways
- Inboxy and Instantly both start at $47/mo for their entry-level plans.
- Instantly offers four pricing tiers, Growth, Hypergrowth, Light Speed, and Enterprise, while Inboxy offers just one, Inboxy Pro.
- Inboxy Pro allows 120 daily emails per inbox across Gmail and Office 365 inboxes for $47/mo.
- Instantly's Growth plan allows 1,000 uploaded contacts and 5,000 emails monthly, while its Light Speed plan allows 100,000 contacts and 500,000 emails monthly for $358/mo.
- Inboxy lists 9 features and 9 integrations, while Instantly lists 8 features and 9 integrations.
Reviewed and updated September 2, 2026
Inboxy vs Instantly: Email Warmup Tool vs Cold Email Platform Comparison
Inboxy is an email warmup tool; Instantly is a cold email platform. Whether you need one, the other, or both depends on which part of the workflow you are buying for: email domain warming and deliverability on one side, cold email outreach on the other. This guide lays out what each vendor publishes.
The Quick Answer
Inboxy is an email warmup tool for email domain warming and deliverability; Instantly is a cold email platform for cold email outreach. By each vendor's own wording, Inboxy lists primary inbox supercharger and domain score iq monitoring, and Instantly lists unlimited email accounts and unlimited email warmup.
Both start at the same price point ($47/mo), so the decision comes down to features and workflow fit.
If your priority is building sender reputation and improving inbox placement, Inboxy is the one built for it; for sending campaigns that land in the inbox and generate replies, that is Instantly. Many teams run one of each.
Understanding the Core Difference
Inboxy is Email warmup tool that improves deliverability by gradually increasing sending volume and boosting domain reputation. It runs warmup through a private network of headless browsers with AI-driven adjustments to sending metrics.
Instantly is Cold email platform with unlimited email accounts, unlimited warmup, and a 450M+ B2B lead database.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Inboxy Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Inboxy Pro | $47/mo | Gmail and Office 365 Inboxes | 120 Daily Emails Per Inbox |
Source: Inboxy Pricing
Instantly Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Growth | $47/mo | 1000 Uploaded Contacts | 5000 Emails Monthly |
| Hypergrowth | $97/mo | 25 000 Uploaded Contacts | 125,000 emails/month |
| Light Speed | $358/mo | 100 000 Uploaded Contacts | 500 000 Emails Monthly |
| Enterprise | Contact Sales | 100 000+ Uploaded Contacts | 500 000+ Emails Monthly |
Source: Instantly Pricing
Pricing Analysis
Both platforms start at the same $47/mo price point. The decision comes down to which feature set and tier structure works better for your expected usage.
Instantly offers 4 pricing tiers compared to Inboxy's 1, giving you more granularity as you scale.
Features Breakdown
- Primary Inbox Supercharger
- Domain Score IQ Monitoring
- AI Powered Inbox Adjustments
- Dynamic Email Scheduling
- Live Inbox Engagement Feed
- AI Generated Emails (GPT-3)
- and 3 more listed below
- Unlimited email accounts
- Unlimited email warmup
- Email verification
- Master inbox
- Campaign analytics
- A/B testing
- and 2 more listed below
Inboxy Key Features
- Primary Inbox Supercharger
- Domain Score IQ Monitoring
- AI Powered Inbox Adjustments
- Dynamic Email Scheduling
- Live Inbox Engagement Feed
- AI Generated Emails (GPT-3)
- IP Warm Up Service
- SMTP Warm Up Service
- Inbox Placement Test
Instantly Key Features
- Unlimited email accounts
- Unlimited email warmup
- Email verification
- Master inbox
- Campaign analytics
- A/B testing
- AI-powered features
- Dedicated IP rotation (Light Speed+)
The two lists below are a diff of each vendor's own feature list by exact wording, so a capability both tools offer can appear on either side under a different name.
Listed only by Inboxy
- Primary Inbox Supercharger
- Domain Score IQ Monitoring
- AI Powered Inbox Adjustments
- Dynamic Email Scheduling
- Live Inbox Engagement Feed
- AI Generated Emails (GPT-3)
- IP Warm Up Service
- SMTP Warm Up Service
- Inbox Placement Test
Listed only by Instantly
- Unlimited email accounts
- Unlimited email warmup
- Email verification
- Master inbox
- Campaign analytics
- A/B testing
- AI-powered features
- Dedicated IP rotation (Light Speed+)
Integration Ecosystem
Inboxy Integrations
Inboxy connects with: Personal Gmail, Google Workspace, Outlook/Office (SMTP), Outlook/Office (Oauth), Mailgun, GoDaddy, Inboxroad, Sendgrid, Custom SMTP.
Instantly Integrations
Instantly connects with: HubSpot, Salesforce, Pipedrive, Zapier, Make, n8n, Clay, Slack, Google Calendar.
Integrations listed only by Inboxy: Personal Gmail, Google Workspace, Outlook/Office (SMTP), Outlook/Office (Oauth), Mailgun, GoDaddy, Inboxroad, Sendgrid, Custom SMTP.
Integrations listed only by Instantly: HubSpot, Salesforce, Pipedrive, Zapier, Make, n8n, Clay, Slack, Google Calendar.
Use Case Recommendations
Best Fit for Inboxy
- Budget-conscious teams looking for an affordable email warmup tool
- Teams that need a wide feature set (9 capabilities listed)
- Teams launching new email domains for outreach
- Organizations recovering from deliverability issues
Best Fit for Instantly
- Budget-conscious teams looking for an affordable cold email platform
- Enterprise buyers who prefer custom pricing and dedicated support
- Sales teams running high-volume outbound email campaigns
- Agencies managing multiple client outreach programs
Feature Comparison Summary
| Feature | Inboxy | Instantly |
|---|---|---|
| Starting Price | $47/mo | $47/mo |
| Top Tier Price | $47/mo | Contact Sales |
| Total Features Listed | 9 | 8 |
| Integrations | 9 | 9 |
Getting Started Checklist
- Define your email domain warming and deliverability and cold email outreach requirements and monthly budget
- Estimate your expected warmup email volume and 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
Inboxy serves the email domain warming and deliverability side of an outbound stack and Instantly the cold email outreach side. Inboxy offers a more accessible entry point at $47/mo, while Instantly starts at $47/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.
Pricing and features verified as of September 2026. Visit Inboxy and Instantly for current information.
Frequently asked questions.
Frequently asked questions- What is the difference between Inboxy and Instantly?
- Inboxy is an email warmup tool focused on domain warming and deliverability, using a private network of headless browsers with AI-driven sending adjustments. Instantly is a cold email platform built for sending outreach campaigns, offering unlimited email accounts, unlimited warmup, and a 450M+ B2B lead database. They address different parts of the outbound email workflow.
- Which is cheaper, Inboxy or Instantly?
- Both platforms start at the same price, $47/mo. Inboxy only offers one plan, Inboxy Pro, at that price, while Instantly offers four tiers starting at $47/mo for Growth and rising to $358/mo for Light Speed, plus a custom Enterprise tier for higher volume.
- Can I use both Inboxy and Instantly together?
- Yes, the article notes that many teams run one of each since the two tools solve different problems. Inboxy handles email warmup and deliverability, while Instantly handles the actual cold email sending and campaign management, so they can complement rather than replace each other.
- Who should choose Inboxy over Instantly?
- Inboxy fits budget-conscious teams that specifically need an affordable email warmup tool, teams launching new email domains for outreach, and organizations recovering from deliverability issues. It lists 9 features focused on inbox placement and domain reputation rather than campaign sending.
- Who should choose Instantly over Inboxy?
- Instantly fits budget-conscious teams needing an affordable cold email platform, enterprise buyers who want custom pricing and dedicated support, sales teams running high-volume outbound campaigns, and agencies managing multiple client outreach programs. It offers four pricing tiers for scaling contact and email volume.
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
Connect on LinkedIn →Explore more.
Ready to scale your outreach?
We build GTM engines that book real meetings. See the receipts.
Related articles.
Amplemarket vs Instantly: Sales Engagement Platform vs Cold Email Platform Comparison
Compare Amplemarket (sales engagement platform) and Instantly (cold email platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Boost Inbox vs Inboxy: Email Warmup Tool Comparison
Compare Boost Inbox and Inboxy side by side. See pricing, features, and integrations to choose the right email warmup tool for your needs.
Mailmeteor vs Reply.io: Cold Email Platform Comparison
Compare Mailmeteor and Reply.io side by side. See pricing, features, and integrations to choose the right cold email platform for your needs.
Emelia vs Manyreach: Cold Email Platform Comparison
Compare Emelia and Manyreach side by side. See pricing, features, and integrations to choose the right cold email platform for your needs.
Emelia vs Salesforge: Cold Email Platform vs Sales Engagement Platform Comparison
Compare Emelia (cold email platform) and Salesforge (sales engagement platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
GMass vs PlusVibe: Cold Email Platform Comparison
Compare GMass and PlusVibe side by side. See pricing, features, and integrations to choose the right cold email platform for your needs.