Veteran Email Delivery SaaS 'Meruhaikun', Used by 2,500 Companies, Evolves Significantly!

Operating since 2002 as a pioneer in email delivery SaaS, 'Meruhaikun' (operated by Delightful Inc., Headquarters: Koto-ku, Tokyo) released a new lineup 'Pro Plan' in April 2026, specialized in acquiring and nurturing prospects (lead nurturing) in addition to delivering to existing customers.

[Meruhaikun Pro Plan Details: https://www.meruhaikun.com/plan/?plan=pro]

Development Background: Email delivery shifts from 'mass sending' to 'individual optimization'

'Meruhaikun', which has been highly evaluated by users for many years, such as winning the 'ITreview Grid Award 2025 Fall', has built trust as an infrastructure boasting high deliverability rates through rapid response to recent Gmail guideline changes and standard DKIM equipment.

Recently, regardless of B2B/B2C, how to efficiently connect acquired leads (prospects) to contracts has become an issue for companies. Therefore, maintaining the stable foundation of 'Meruhaikun' with its 24-year operational track record, we developed the 'Pro Plan' to provide features close to advanced Marketing Automation (MA) at the industry's lowest price level starting from 4,800 yen per month.

5 Evolutionary Points of the 'Pro Plan'

1. Unlimited Step Emails and Birthday Emails Can be used with an unlimited number of scenarios and steps. Automatically improves the conversion rate (CVR) through a meticulous approach tailored to customer attributes and behaviors.

2. Over 30 Types of Customizable, Highly Functional Forms Create individual forms tailored to purposes such as exhibitions, seminars, and document requests. Efficiently acquire prospect information from diverse contact points and link it directly to the database.

3. 'Retargeting Emails' for Reliable Follow-up Extract only highly interested users, such as those who opened or clicked, and send 'follow-up emails'. By approaching them while their interest is hot, you won't miss business opportunities.

4. External System Integration (kintone, WordPress, Google Spreadsheets) Integrates with external tools like kintone and WordPress. Smooth data utilization is possible without stopping existing business workflows.

5. Secure Multiple Administrator Login Multiple personnel can log in with individual IDs. Safely supports organizational operation, such as managing operation logs and maintaining security levels.