How to Write Cold Emails That Get Replies Using AI
Arise · 2026-03-15 · 6 min read
How to Write Cold Emails That Actually Get Replies Using AI
Here's the uncomfortable truth about cold email: 99% of cold emails are ignored. The average reply rate across industries sits below 2%. Most people mark them as spam before finishing the subject line.
The problem isn't cold email itself — it's that most cold emails are terrible. They're generic, self-focused, and obviously copy-pasted. Personalization at scale used to be impossible manually. Now, with AI, it's not only possible — it's fast.
The Cold Email Writer agent on AgentPlace researches your prospect, writes a hyper-personalized email, and generates A/B variants — all from a single command.
Why Cold Emails Fail
Before looking at the solution, let's diagnose the problem:
- No personalization — "Hi
{First Name}, I noticed your company..." doesn't count - Self-focused openers — Leading with your offer instead of their pain
- Too long — More than 150 words? Most people won't finish it
- Weak or no CTA — "Let me know if you're interested" gets zero replies
- No follow-up — 80% of replies come after the 2nd or 3rd email
The Cold Email Writer solves all of these by doing real research on each prospect and crafting emails that feel genuinely personal.
What the Agent Does
The Cold Email Writer:
- Researches the prospect — scrapes LinkedIn, company site, recent news
- Identifies a personalized hook — finds something specific to open with
- Writes subject line + body + CTA — short, punchy, and relevant
- Generates A/B variants — 2–3 subject line alternatives for testing
- Creates a follow-up sequence — 3-email drip ready to load into your tool
Installation
npm install -g @agentplace/cli
agentplace login
agentplace install cold-email-writer
Basic Usage
agentplace run cold-email-writer \
--prospect "https://linkedin.com/in/johndoe" \
--offer "We build landing pages for B2B SaaS companies"
For a more targeted email:
agentplace run cold-email-writer \
--prospect "https://linkedin.com/in/sarahlee-cmo" \
--offer "AI-powered email automation for e-commerce brands" \
--tone friendly \
--length short \
--variants 3 \
--follow-up
Configuration Options
| Option | Description | Default |
|---|---|---|
--tone |
Email tone: professional, friendly, direct, casual | professional |
--length |
Email length: short (under 100 words), medium, long | medium |
--variants |
Number of subject line A/B variants to generate | 2 |
--follow-up |
Generate a 3-email follow-up sequence | false |
--prospect |
LinkedIn URL or company URL of target prospect | (required) |
--offer |
Your product/service offer description | (required) |
Advanced: Bulk Mode with CSV Input
Got a list of 100 prospects? Use bulk mode:
agentplace run cold-email-writer --bulk prospects.csv --offer "We build AI agents for sales teams"
Your CSV format:
name,linkedin_url,company,role
John Smith,https://linkedin.com/in/johnsmith,Acme Corp,Head of Marketing
Sarah Lee,https://linkedin.com/in/sarahlee,StartupXYZ,CEO
The agent researches each prospect individually and writes a unique email for every row. Output is a emails-output.csv file ready to import into Apollo, Lemlist, or Instantly.
A/B Subject Line Examples
Here's a real example of what the agent generates for a web design agency targeting SaaS founders:
Variant A: "Quick question about [Company]'s onboarding page"
Variant B: "How [Competitor] gets 2x more trial signups (and how you can too)"
Variant C: "Your landing page vs. what converts in 2026"
Notice the difference from generic subject lines like "Checking in" or "Partnership opportunity." These are specific, curiosity-driven, and relevant.
Comparison: AI Cold Email vs. The Alternatives
| Tool | Personalization | Speed | Cost | Reply Rate Potential |
|---|---|---|---|---|
| AgentPlace AI | Deep (per-prospect research) | Fast | Free | 15–30% |
| Lemlist | Template-based | Fast | $59/mo | 5–10% |
| Apollo | Sequence-based | Medium | $49/mo | 3–8% |
| Manual Writing | Deep (1 at a time) | Very slow | Time cost | 10–25% |
| Generic blast | None | Very fast | Low | Under 1% |
Tips That Actually Move the Needle
1. Make the first line undeniably personal. Reference something specific — a post they wrote, a product launch, a job change. This is where AI research pays off.
2. Keep it short. Under 100 words for the first email. Respect their time. You can go deeper in follow-ups.
3. Send a follow-up sequence. Most replies come on email 2 or 3. The agent generates a 3-part sequence — use it.
4. One clear CTA per email. "Are you open to a 15-minute call Tuesday or Wednesday?" beats "Let me know if you're interested."
5. Test subject lines relentlessly. Use the A/B variants the agent generates. A 1% improvement in open rate compounds over thousands of prospects.
Get Started
The Cold Email Writer is free on AgentPlace. Get Email Sequence Writer on AgentPlace →
Stop sending emails that get ignored. Let the agent do the research, write the copy, and give you variants to test — so you can focus on the conversations, not the prospecting.