title: "GTM Experiment #3: WhatsApp vs Email Outreach — We Tested Both for 2 Weeks"

category: "GTM Experiments"

date: "March 8, 2026"

readTime: "5 min read"

author: "Nebulaa Team"

GTM Experiment #3: WhatsApp vs Email Outreach — We Tested Both for 2 Weeks

Same leads. Same message. Two channels. Very different results.

This experiment came from a simple observation: Karan, who runs a logistics SaaS for e-commerce companies in Chennai, was getting roughly 2–3% reply rates on his outbound email sequences. He'd heard WhatsApp had higher open rates. He wanted to know if that actually translated to replies and demos, or if it was just a vanity metric.

He split 200 qualified leads down the middle and ran both channels for two weeks with Pulsar. Here's the full breakdown.

The Setup

**200 leads** — all e-commerce companies with 100–500 shipments per month, sourced from a combination of LinkedIn and a lead database. Each lead had a phone number and an email address.

**Group A (100 leads)**: Outreach via email only. Three-email sequence over 10 days:

**Group B (100 leads)**: Outreach via WhatsApp only. Three-message sequence over 10 days, identical content adapted for WhatsApp format — shorter, more conversational, no formal salutation.

**Pulsar handled both sequences** — personalising each message with company name, shipment volume tier, and a specific pain point relevant to their geography.

The Results

WhatsApp got **4x the reply rate** and **7x the demo bookings** from the same leads, with the same message.

Why WhatsApp Outperforms Email for Indian B2B

**1. Read receipts change behaviour.** With email, you never know if they saw it. WhatsApp's double blue ticks mean the lead knows you know they read it. This subtly increases response pressure — in a good way.

**2. Inbox competition is lower.** The average Indian professional gets 80–120 emails per day. Their WhatsApp business messages? Maybe 5–10. Being a small fish in a small pond beats being invisible in the ocean.

**3. The format is naturally casual.** Email invites formal language. Formal language feels like a pitch. WhatsApp invites conversation. Conversation leads to replies.

**4. Indian communication culture favours WhatsApp.** Whether you're talking to a distributor in Surat, a logistics head in Pune, or a startup ops lead in Hyderabad — WhatsApp is the channel where real decisions get discussed. Email is for paper trails.

What Didn't Work on WhatsApp

**4 people blocked Pulsar's number.** All four were from large enterprise companies (500+ employees) where WhatsApp outreach is seen as unprofessional. For mid-market and SMB, WhatsApp wins. For enterprise, email is still safer.

**Message length mattered a lot.** Early drafts that were too long (4+ paragraphs) got lower reply rates than short, punchy messages. The best-performing WhatsApp message was 63 words.

The Follow-Up Experiment

After the 10-day sequence, Karan ran a third group: email first, then WhatsApp follow-up for non-openers. The combined channel approach got an 18% reply rate — the best of all three approaches.

The lesson: use email to establish legitimacy, use WhatsApp to get the actual response.

Conclusion

If you're doing B2B outreach in India and you're not using WhatsApp, you're leaving a significant amount of pipeline on the table. The data is clear. Pulsar can run sequences across both channels simultaneously — personalised, timed, and tracked.

Key Takeaways

Want Pulsar to run your next outreach experiment across both channels? [Start your free 7-day trial →](/)