Cold Email Rewriter + Reply Rate Predictor

Paste a cold email draft. Get back a predicted reply rate plus 3 stronger variants tuned for different buyer responses.

Powered by Claude Sonnet 4.6. Pay only per rewrite. No subscription.

What you get back per draft

Field	Description
original_reply_rate	Predicted reply rate of your original draft (0 to 100)
original_diagnosis	One paragraph explaining what holds your draft back
variants	3 rewritten variants, each hitting a different angle
best_variant_subject	The variant with the highest predicted reply rate
best_variant_reply_rate	The reply rate predicted for that best variant

Each variant includes its own subject, body, angle (specificity / brevity / social proof / curiosity / contrarian), predicted reply rate, and reasoning.

Pricing

Pay per rewrite generated, $0.10 USD per draft processed (you get 3 variants per rewrite).

You only pay for successful results. Failed drafts (malformed JSON, API errors) are not charged.

Typical use:

• 10 drafts: $1.00
• 50 drafts: $5.00
• 500 drafts: $50.00

Compare to Smartwriter at $59/mo or Lavender at $29/mo subscription minimums.

How to use it

1. Click Try for free at the top of this page.
2. Paste your cold email drafts into the drafts field (array of {subject, body} objects).
3. Write a paragraph describing your audience (role, company size, what they care about).
4. Pick how many variants per draft (1 to 5, default 3).
5. Hit Start. Results stream into the dataset as each rewrite finishes.

Use cases

• SDR teams: A/B test 3 angles per outreach campaign without writing copy by hand.
• Founders: Sanity-check your cold emails before sending. Know which subject lines actually work.
• Agencies: Deliver rewritten cold-email sequences to clients in minutes, not days.
• Marketing teams: Generate variant libraries for sequence tools like Smartlead, Lemlist, Instantly.

What this actor does NOT do

• It does not send emails. Use Smartlead, Lemlist, or SMTP for sending.
• It does not generate emails from scratch. It rewrites existing drafts. For greenfield personalization, use the AI Sales Personalizer Actor.
• It does not personalize per recipient. It improves the template. For per-recipient personalization, use the Sales Personalizer.

Companion: AI Sales Personalizer

Build the personalized opener once per company with the Sales Personalizer ($0.15/result), then rewrite the surrounding template with this actor ($0.10/rewrite). Together they replace Lavender + Smartwriter + the human copy editor.

Tags

ai cold-email copywriting sales sdr outreach claude b2b email-marketing ab-testing

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Made with Claude Sonnet 4.6 by Emily Ward, Cancel Costs.

Integrations

This actor works out of the box with every Apify-supported integration:

• API: call via Apify API or any official SDK (Python, JavaScript, PHP, .NET). Returns a clean dataset URL.
• Schedule: set a daily, weekly, or custom cron cadence in Apify Console. Combine with notification for fresh feeds.
• Webhooks: wire ACTOR.RUN.SUCCEEDED to Slack, Discord, Zapier, Make, n8n, Pipedream, or any HTTPS endpoint.
• MCP: this actor is discoverable through Apify's hosted MCP server at mcp.apify.com for Claude, Cursor, Cline, Windsurf, and other MCP clients.
• n8n / Make / Zapier: native HTTP-Request integration. Trigger the actor on schedule, pipe results to Google Sheets, Airtable, your CRM, or any database.

Try it free

Every Apify user gets $5/month in free platform credits (around 250 events at this actor's per-event price). Run preview mode first to confirm output shape before scaling.

New to Apify? Sign up here to get free credits on signup.

What's New

• 2026-06-03: Metadata, categories, and SEO refreshed. Latest version live on Apify Store.

Last Updated

2026-06-03