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Co-Marketing and Co-Selling: How to Win Bigger Together in B2B

Writer: Admin2BAdmin2B

Co-Marketing and Co-Selling: How to Win Bigger Together in B2B

The difference, the benefits, and the data behind their impact


In B2B, partnerships aren’t just about logos, they’re about driving real revenue together. That’s why more companies are doubling down on co-marketing and co-selling as core motions inside their partner ecosystem.


Used right, these strategies help you reach new audiences, build trust faster, and close deals more efficiently. And now, we’ve got the data to prove it.

This article covers:

  • What co-marketing and co-selling really mean

  • Why they work, especially for startups and scaleups

  • How to get started

  • Mistakes to avoid

  • Real results from top B2B teams

Let’s make B2B partnerships simple and revenue-generating!


What Is Co-Marketing?


Co-marketing is when two companies collaborate to promote content, events, or offers to a shared audience.

Think:

  • Co-branded webinars

  • Joint guides or case studies

  • Email campaigns sent to both company lists

  • Social media takeovers

  • Partner spotlights

The goal is awareness and demand generation. Each brand brings its own audience and credibility, and together, they create something more valuable than either could alone.

Why It Works

Trust is everything in B2B. And according to the 2025 Future of Revenue report, companies that co-market with partners report a 52% increase in reach and significantly higher-quality leads.

In a world where cold outreach is getting colder, warm intros from trusted partners cut through the noise.

What Is Co-Selling?

Co-selling is when two companies work together during the sales process.

Instead of just sharing leads, you:

  • Make mutual introductions

  • Join calls together

  • Create custom offers for shared customers

  • Navigate procurement as a team

It’s about converting, not just promoting.

Why It Works

Deals involving co-selling partners:

  • Close 38% faster

  • Are 24% more likely to close

  • Deliver higher average contract values

That’s the power of two trusted voices solving a bigger problem together.


Co-Marketing vs. Co-Selling: What’s the Difference?


Co-Marketing

Co-Selling

Goal

Generate awareness and leads

Convert leads and close deals

Stage

Top or middle of funnel

Bottom of funnel and post-lead

Involves

Marketing teams

Sales, partnerships, marketing

Tactics

Webinars, content, campaigns

Joint calls, shared accounts, custom offers

Best For

Early-stage partnerships

Mature, strategic partnerships

When to Use Co-Marketing

You should consider co-marketing if:

  • You serve similar or adjacent audiences

  • You want to test partner alignment

  • You’re launching a product or event

  • You need leads, not just awareness

It’s ideal for early-stage B2B companies who want to validate a partnership before investing deeper.

Start Simple

  • Co-author a blog post

  • Host a short webinar

  • Feature a partner in your newsletter

  • Create a downloadable resource together

Small experiments can lead to big impact.

When to Use Co-Selling

You’re ready to co-sell if:

  • You and your partner have shared customers or overlapping accounts

  • You sell complementary solutions

  • Your sales teams trust each other and have open communication

In 2025, aligned GTM teams are nearly 2x more likely to have reps co-selling with partners, and ecosystem-led growth (ELG) deals close 38% faster. It’s no surprise co-selling is a core growth motion for top-performing B2B teams.

How to Start Co-Selling

  • Use a tool like Crossbeam to identify account overlap

  • Agree on a small set of target accounts

  • Assign one lead per deal, but collaborate closely

  • Debrief after every deal: what worked, what didn’t?

What the Data Tells Us

The latest research reinforces what leading B2B teams already know:

  • Deals involving partner collaboration are 24% more likely to close

  • ELG leads are 24% higher quality than traditional inbound

  • Aligned teams see 38% shorter sales cycles

  • 52% of aligned GTM teams involve co-selling in active deals


Co-marketing and co-selling aren’t trends. They’re proven strategies driving real outcomes, especially in an ecosystem-led GTM.

Common Mistakes to Avoid

Even strong partnerships can fall flat without the right execution. Avoid these pitfalls:

  • No clear goal: Define what success looks like for each campaign or deal.

  • Uneven effort: Make sure both sides are contributing fairly.

  • Weak handoff: Marketing leads need clear sales follow-up.

  • Wrong partner fit: Alignment on ICP and GTM motion matters more than brand name.


How to Get Started Today

Whether you're building your first partner program or scaling a mature one, here’s how to roll out co-marketing and co-selling:

  1. Identify 2–3 ideal partners (complementary, not competitive)

  2. Start with a co-marketing campaign: blog, event, or guide

  3. Use insights to align sales teams

  4. Pilot a small co-selling motion with shared accounts

  5. Track results, optimize, repeat

And if you’re looking for partners who are actually ready to do this, not just listed in a directory, check out PARTNER2B.

Final Thoughts

Co-marketing and co-selling are how B2B companies turn partner strategy into partner revenue.

They help you:

  • Increase reach by 52%

  • Close deals 38% faster

  • Improve lead quality and win rates

  • Align marketing, sales, and partnerships around shared results

At PARTNER2B, we make it easy to find partners who are ready to go beyond surface-level collaboration. Whether you're starting from zero or scaling fast, we help you connect with companies ready to co-market, co-sell, and grow ecosystems together.

Let’s make B2B partnerships simple and let’s grow together!


More to Explore

Happy partnering!

 
 
 

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