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Mailwarm VS Risu

Compare Mailwarm VS Risu and see what are their differences

Mailwarm

Email warmup tool to avoid spam folder, since 2020 - Backed by Email Deliverability Experts

Rating
5.0 · 3 reviews
Pricing
Paid $69 / Monthly ("Up to 50 emails/day", "1 account (1 SMTP)", "Chat support")
Alternatives Is it good?
Risu

Making gifts easy to buy and fun to open

Rating
0 reviews
Alternatives Is it good?
Sendaway.co
Send files and text between devices with a simple 6-digit code. No account, email or shared link required. sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Email Marketing popularity
100% vs 0%
alternatives listed
133 vs 14

Base details

Website, pricing, platforms and company facts side by side.

Mailwarm
Risu
Website mailwarm.com risu.app
Pricing
Paid $69 / Monthly ("Up to 50 emails/day", "1 account (1 SMTP)", "Chat support") Official pricing
—
Platforms
GMail Outlook SMTP Zoho Web Yahoo Mail +3
—
Company Startup from France · 10 - 19 employees · 2020 —
Listed in
Email Warm Up Email Tools Email Marketing Tools Cold Outreach Cold Emailing Email Marketing Startup Marketing Marketing Tools +5
Web App Productivity Marketing Tech iPhone +2

About Mailwarm and Risu

In their own words, as submitted to SaaSHub.

Mailwarm
Risu

Mailwarm is an automated email warmup and deliverability platform designed to help businesses keep their emails out of spam folders and consistently reach the inbox. Since 2020, Mailwarm has helped founders, sales teams, marketers, and agencies improve email deliverability, build strong sender...

Read more about Mailwarm

No description of Risu yet.

Features and specs

What each product offers, as listed by its team.

Mailwarm 8 features
Risu 4 features
  • Automated Email Warmup
    Mailwarm automatically warms up inboxes, domains, and SMTP servers by generating natural interactions between real email accounts to build and protect sender reputation.
  • Multi-Provider Warmup
    Supports warmup across Gmail, Outlook, Microsoft 365, Yahoo, and other providers to create realistic engagement signals and improve overall inbox placement.
  • Spam Score Monitoring
    Provides a weekly spam score that shows how often your emails land in your spam versus inbox, helping you track deliverability progress with real data.
  • Bounce Prevention & Verification
    Built-in verification systems detect and deactivate invalid inboxes automatically to prevent bounces, one of the most harmful signals for email deliverability.
  • One-Click Outlook & Office365 Setup
    Connect Microsoft 365 and Outlook accounts instantly through the official Microsoft sign-in process without complex SMTP configuration.
  • Simplified SMTP Configuration
    Pre-configured SMTP settings for major providers with step-by-step guidance make it easy to connect and start warming up in minutes.
  • Deliverability Analytics
    Detailed reports help users monitor warmup progress, engagement trends, and overall email performance to understand and improve sender reputation.
  • Engagement Simulation
    Mailwarm engages with emails by marking them as important, replying, and removing them from spam, mimicking the actions of a real recipient and thereby boosting sender reputation.

Possible disadvantages

  • Cost
    Mailwarm is a premium service, which may be expensive for small businesses or individual users with limited budgets.
  • Dependency on Third-Party Tool
    Relying on an external service like Mailwarm means users don't have full control over the warming process, and there might be risks related to data privacy and service reliability.
  • Learning Curve
    Although the platform is designed to be user-friendly, new users might still face a learning curve in understanding and fully utilizing all features and analytics provided.
  • Limited Customization
    Some users may find that Mailwarm’s automation features lack the level of customization required for highly specific or complex email strategies.
  • No Instant Results
    The warming process is gradual and can take several weeks to show significant improvements in deliverability, which might not meet the needs of users looking for immediate results.
  • Personalized Learning
    Risu offers personalized learning experiences tailored to each student's pace and skill level, which can enhance understanding and retention.
  • Engaging Content
    The app includes interactive and engaging educational content designed to keep students motivated and interested in learning.
  • Progress Tracking
    Risu provides tools for tracking student progress, enabling parents and teachers to monitor improvements and areas needing attention.
  • Comprehensive Curriculum
    Covers a wide range of subjects, ensuring students receive a well-rounded education.

Possible disadvantages

  • Cost
    Risu may require a subscription or in-app purchases, which could be a barrier for some users.
  • Screen Time
    Increased reliance on the app could contribute to excessive screen time for students, which is a concern for many parents.
  • Technical Issues
    Users may occasionally experience technical glitches or require a stable internet connection, which can disrupt learning.
  • Content Limitations
    Some users might find that the content doesn't align perfectly with specific educational standards or curriculums.

Analysis

An editorial look at what each product does well and who it suits.

Mailwarm
Risu

Overall verdict

  • Mailwarm is generally considered useful for businesses and individuals looking to improve their email deliverability rates. While there are positive reviews about its effectiveness in enhancing email reputation and ensuring better deliverability, the effectiveness may vary depending on individual use cases and how well the service is integrated with existing email strategies. It is most beneficial for users who have experienced issues with emails going to spam or have recently started using new email addresses for their campaigns.

Why this product is good

  • Mailwarm is a service designed to help increase the deliverability of emails by gradually warming up email addresses, particularly those used in cold email campaigns. It automates the process by sending emails from your account to its network of participants and receiving replies, which helps to build a positive reputation for new email addresses with email service providers. This can lead to better inbox placement and reduce the chances of emails being marked as spam, especially important for businesses engaged in outreach and marketing via email.

Recommended for

  • Businesses engaged in regular cold email outreach.
  • Startups launching new email campaigns.
  • Marketers looking to improve email deliverability.
  • Individuals and companies experiencing low open rates due to spam issues.

No analysis of Risu yet.

Videos

Walkthroughs and reviews on video.

Mailwarm 0 videos + Add
Risu 2 videos + Add

No Mailwarm videos yet. You could help us improve this page by suggesting one.

5 Minutes of Cultured Risu trying to polluting pure water Kobo on Meme Review stream...

More videos

  • - Risu & Iofi Can't Stop Laughing At These Very Sus Club Name In Fishing Planet

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
Mailwarm
Risu
100% 100%
Email Marketing
0% 0%
0% 0%
Web App
100% 100%
100% 100%
Email Warm Up
0% 0%
0% 0%
Productivity
100% 100%

Questions & Answers

As answered by people managing Mailwarm and Risu.

What makes your product unique?

Mailwarm's answer

Mailwarm is an email warmup and deliverability platform built by a Y Combinator and Station F startup.

Since 2020, we’ve worked with many types of companies: SaaS startups, recruitment agencies, e-commerce brands, and sales teams; to help them improve inbox placement safely.

Mailwarm is unique because it offers: - Real multi-provider warmup (Gmail, Outlook, Microsoft 365, Yahoo)

  • Clear and real spam score tracking

  • Built-in bounce prevention

  • Easy setup and stable automation

Our focus is simple: help businesses keep emails out of spam and land in the inbox.

Why should a person choose your product over its competitors?

Mailwarm's answer

Mailwarm delivers real, measurable results instead of risky shortcuts.

Users choose Mailwarm because it provides: - Automated email warmup that protects sender reputation

  • Multi-provider engagement for realistic signals

  • Spam score to track deliverability progress

  • One-click Outlook and Office365 connection

  • Reliable campaigns with auto-recovery

It’s an easy, transparent, and professional way to improve email deliverability.

How would you describe the primary audience of your product?

Mailwarm's answer

Mailwarm is for anyone who depends on email outreach:

  • Sales teams sending cold emails

  • Founders and startups launching new domains

  • Marketing agencies

  • Recruiters and staffing firms

  • Growth and outbound teams

If inbox placement matters to your business, Mailwarm is built for you.

What's the story behind your product?

Mailwarm's answer

Mailwarm started as a real problem we faced ourselves.

We were two founders working at Station F in Paris, the largest startup incubator in Europe, trying to sell our own products. Every time we launched outreach campaigns, our emails kept landing in spam.

To solve this, we built an internal email warmup system for our personal use. After deep research into email deliverability, we created a stronger, more reliable solution.

Other startups in the incubator quickly asked to use it too; so we turned it into a real product.

After launching publicly, Mailwarm became #1 Product of the Day on ProductHunt and was accepted into Y Combinator, the world’s most prestigious startup accelerator.

Since then, Mailwarm has grown into a trusted platform used by thousands of companies to improve inbox placement and email deliverability.

Which are the primary technologies used for building your product?

Mailwarm's answer

Mailwarm is a secure cloud-based SaaS platform built on:

  • SMTP and IMAP email protocols

  • Advanced verification systems

  • Multi-provider infrastructure

  • Real-time analytics and monitoring

  • Reliable automation engines

These technologies ensure stable, continuous email warmup.

Who are some of the biggest customers of your product?

Mailwarm's answer

As a Y Combinator and Station F startup, Mailwarm works with:

  • Tech startups and SaaS companies

  • Recruitment and staffing agencies

  • Real Estate Agencies

  • B2B marketing agencies

  • E-commerce brands

  • Sales and outbound teams

  • Freelancers and consultants

From France to global markets, hundreds of organizations trust Mailwarm to improve email deliverability and inbox placement.

User comments

Share your experience with using Mailwarm and Risu. For example, how are they different and which one is better?

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Reviews and articles

External articles and on-site reviews we used to compare the two products.

Mailwarm 5.0 · 3 reviews
Risu no reviews yet
  • Steady Improvement in Email Deliverability
    SaaSHub review
    · Mar 2026

    I decided to try Mailwarm after having consistent issues with my emails landing in spam folders. At the beginning, I wasn’t fully sure what to expect, but the onboarding process was simple enough to get me started...

  • Helped My Emails Finally Land in Inbox
    SaaSHub review
    · Mar 2026

    I started using Mailwarm because I was struggling with my emails going straight to spam, especially for outreach. At first, I wasn’t expecting much, but after a couple of weeks, I actually started noticing a...

  • A very good email warmup tool
    SaaSHub review
    · Feb 2026

    I have been using Mailwarm to warm up email accounts and improve overall deliverability for my outreach campaigns. The setup process was very simple and everything runs automatically without requiring constant...

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We have no reviews of Risu yet. Be the first one to post

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