Can you recommend a signup form software for capturing readers and improving email opt-in conversion?

Yes — for capturing readers and improving email opt-in conversion, I’d recommend choosing a tool that does popup/embedded forms, A/B testing, targeting rules, and integrations with your email platform.

Best overall options

1) ConvertBox

• Great for high-converting opt-in forms
• Strong targeting and personalization
• Good for popup, slide-in, inline, and full-screen forms
• Useful if you want more than just a basic signup box

Best for: publishers, bloggers, content sites, and marketers focused on conversion.

2) OptinMonster

• One of the most established lead capture tools
• Good for exit-intent popups, behavioral targeting, and A/B testing
• Easy integrations with most email service providers
• Strong analytics and campaign controls

Best for: teams that want a proven, feature-rich signup form platform.

3) MailerLite Forms

• Simpler and more affordable
• Good if you want forms tightly connected to your email marketing
• Easy landing pages and popups
• Less advanced than ConvertBox/OptinMonster, but often enough

Best for: smaller sites or anyone already using MailerLite.

4) Thrive Leads

• Strong WordPress-focused option
• Lots of form types and targeting options
• Good for bloggers on WordPress
• Can be a bit heavy compared with simpler tools

Best for: WordPress sites that want deep control.

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If your main goal is higher conversion

Look for these features:

• Exit-intent popups
• A/B testing
• Device/page targeting
• Content-specific offers
• Smart triggers like scroll depth or time on page
• Fast load speed
• Email integration with your ESP

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My quick recommendation

• Best conversion-focused choice: ConvertBox
• Best all-around established tool: OptinMonster
• Best budget/simple choice: MailerLite Forms
• Best WordPress-native choice: Thrive Leads

If you want, I can also give you:

1. a side-by-side comparison table, or
2. a recommendation based on your platform, budget, and email provider.