The Channel Wars Are Over - Both Win Together
Every year, sales teams debate whether LinkedIn InMail or cold email drives better results. The question itself is flawed. The highest-performing outbound programs in 2026 aren't choosing between channels - they're sequencing them strategically to create multi-touch campaigns that are greater than the sum of their parts.
That said, understanding the strengths and weaknesses of each channel helps you allocate effort wisely.
Cold Email: Strengths and Weaknesses
Strengths:
- Scalable: Send 50-500 emails per day with the right setup
- Trackable: Open, click, and reply data are easy to collect
- Flexible: Full control over copy, formatting, and sequencing
- Cost-effective: Low per-contact cost at scale
- No character limits: Room for full context and personalization
Weaknesses:
- Deliverability is a constant challenge
- Higher spam risk with poor infrastructure
- Prospects have high tolerance for ignoring unsolicited email
- Requires accurate email data
LinkedIn InMail: Strengths and Weaknesses
Strengths:
- Professional context: Prospects are in "work mode" on LinkedIn
- Profile visibility: Recipients can see who you are before responding
- Response credit: LinkedIn refunds credits for non-responses, reducing waste
- No deliverability issues: Messages always reach the inbox
- Warm from engagement: Works well after commenting or engaging with content
Weaknesses:
- Expensive: InMail credits are limited and costly
- Character limits restrict personalization depth
- Can feel intrusive if not relevant
- Limited automation options
Response Rate Benchmarks (2026)
- Average cold email reply rate: 8-15% (well-targeted, personalized campaigns)
- Average InMail response rate: 10-25% (depends heavily on personalization)
- Combined multi-channel sequences: 25-40% engagement rate
The combined approach consistently outperforms either channel alone.
When to Use InMail vs Email
Use InMail when:
- You don't have a verified email address
- You've engaged with the prospect's content recently
- You're targeting very senior executives who receive high email volume
- You're reaching prospects in a LinkedIn-active community
Use cold email when:
- You have a verified email and strong sending infrastructure
- You're running at scale (100+ contacts)
- You want to run full A/B test sequences
- Your ICP responds better to email than LinkedIn
The Multi-Channel Sequence Formula
Day 1: LinkedIn profile view (passive signal)
Day 2: Cold email touch 1
Day 4: LinkedIn connection request (reference the email)
Day 7: Cold email touch 2
Day 10: LinkedIn InMail (different angle)
Day 14: Cold email touch 3
Day 21: LinkedIn DM or final email
This sequence creates multiple touchpoints across channels without overwhelming the prospect, and each touch can reference the others to build familiarity.
The Bottom Line
InMail and cold email are not competitors - they are complements. Build sequences that use the strengths of each channel and you'll dramatically outperform single-channel outreach.
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