Partner Co-Marketing Playbook

Partner co-marketing is two companies with overlapping buyers creating or promoting something together, so each reaches the other’s audience. It can be a joint webinar, a shared guide, an integration launch or an introduction to each other’s customers. It works when the audiences overlap and the offer serves both. It fails when one side brings the audience and the other brings nothing.

Every startup gets asked to “do some co-marketing” by a company it integrates with, sells alongside or admires. Most of those projects end the same way. A joint webinar with forty registrants, a blog swap nobody reads, and a vague sense that it didn’t work.

It usually fails for a simple reason. Nobody decided what each side was giving, what each side wanted back, or how they’d know.

It is worth doing early because a partner’s audience already trusts the partner. An introduction from a company your buyer uses carries more weight than an ad you place. It can also be the cheapest way to reach a narrow market, since the partner has already spent years building that list. Partners already sit inside many B2B purchases: in Forrester’s 2022 Buyers’ Journey Survey of more than 10,000 B2B purchase influencers, nearly 70% had bought from a partner or another indirect route to market in the previous 12 months, rather than directly from the supplier^[1].

It is also easy to waste. Co-marketing takes more coordination than working alone. A bad partner costs you weeks and gives you an audience that was never going to buy.

Pick one goal before you pick a partner. New pipeline from their customers. Credibility from being seen with a known name. Distribution for something you’ve already built. Adoption of an integration.

Write it in one line: “We want [outcome] from [kind of partner] within [period].” A partner who can’t help with that line isn’t a fit, however well known they are.

The best partner sells to your buyer and solves a different problem for them. For most startups that is one of three kinds: a product you integrate with, an agency or consultant that serves your buyer, or a vendor whose product sits next to yours in the same workflow. Score each candidate on four things:

• Audience overlap. Do their customers match your ideal customer?
• Complementary product. Do you each make the other more useful, rather than compete?
• Reach you can use. Do they have a list, a community or a sales team that will actually promote?
• Ease of working together. Is there a named person who can say yes and do the work?

Check the first test with numbers, not impressions. Account mapping compares your customer and prospect lists with the partner’s to count the accounts you share and the partner’s customers who fit your profile. Start with the counts, and swap names only for the accounts you both agree to work.

A small partner with a perfect overlap beats a famous one with a loose one. Start with the two or three highest scores.

Your first message should show what the partner gets, not what you want. Bring an idea that serves their customers. That could be a guide to their customers’ common question, an integration their users want, or a joint session on a shared problem.

Make it specific enough to say yes to. “Let’s co-market” is easy to ignore. “Let’s run one session for your customers on this problem, and we’ll do the prep” is not.

Before any work starts, put five things in a short shared document:

• The goal for each side. They can differ, as long as both are stated.
• Who does what. Content, design, promotion, hosting, follow-up.
• What each side promotes, and where. Emails, posts, newsletters, sales teams.
• How leads are shared. Who gets which contacts, with what consent, and who follows up.
• How you’ll judge it. The numbers you’ll both look at afterwards.

The lead-sharing line matters most. Agree it before anything goes live, and make sure your forms say clearly which companies will receive a person’s details. If you rely on consent for people in the EU, European regulators’ guidance says that every company that will rely on that consent should be named when it is collected^[2].

Start with one piece that both audiences need. A joint guide, a single session, a shared template, an integration walkthrough. One good asset promoted well beats five thin ones promoted by nobody.

Make it useful on its own terms, not an advert for either company. If a reader would value it without knowing who made it, it’s the right asset. A joint offer can sit inside it, as long as it is simple to claim and needs both products. If the asset is a live session, plan the run of show minute by minute with a named speaker for every part; the Webinar Run-of-Show and Follow-Up Planner has one, and the webinar guide covers what makes a session create pipeline.

Most co-marketing fails here. One side promotes hard and the other posts once. Agree the promotion plan in Step 4 and put dates on it.

Share the finished copy, images and links with the partner, so promoting it costs them almost nothing. Check halfway through whether both sides have done what they agreed, and say so kindly if not.

In the US, if one email promotes both companies, the CAN-SPAM Act lets you choose one of them as the sender. That company must be named in the “from” line and carry the opt-out link and postal address, and if it fails to comply, every company in the message can be held liable. The law makes no exception for business-to-business email^[3].

A joint asset produces interest that goes cold quickly. Each side follows up with its own share of contacts within days, using the agreed wording. Offer something useful next, not a sales call by default.

Keep a simple joint record of what happened to the leads. It is the only way to tell next time whether the partnership produced pipeline or just attention. Route each lead to one named owner, as you would any other; the Lead Management Playbook sets out the rules.

Meet once when the numbers are in. Compare them with the Step 4 goals. Then choose one of three: do it again, change the format, or stop.

Use your own numbers, not an industry benchmark. Track three things for each partnership:

• Qualified leads from the partner’s audience. Count people who match your ideal customer, not total sign-ups.
• Pipeline those leads create. Meetings, opportunities and deals, followed for a full sales cycle.
• Effort each side spent. Hours and money, so you can compare partners fairly.

Count each deal one way, agreed before launch. I use two labels: partner-sourced, when the partner brought the contact in the first place, and partner-influenced, when the partner helped a deal you already had. Record the label in a CRM field so every review counts the same way. A partnership with modest volume but strong pipeline is worth repeating. One with big numbers and no pipeline was a list-building exercise.

Stopping is a fine result. A partnership that doesn’t serve both sides should end politely, not drift. One that works should become a rhythm, such as one joint asset every quarter.

When a partner wants to resell

A reseller or distributor sells your product for you, usually alongside many others. Your product competes for their reps’ attention, so the handoff decides whether it gets sold or sits in a catalog. Agree six things in writing before the first sale.

1. Who owns the customer. Who signs the contract, who supports the customer, and who the customer calls when something breaks.
2. How leads are registered. A partner registers a deal before working it, and you do not compete for it. Without this, the first argument over a lead can end the partnership.
3. A partner kit. A one-page pitch for their reps, the questions that qualify a buyer, approved claims and proof, pricing and margin, and a short demo or training they can repeat without you.
4. Rep training and a launch. Train their reps in person or live online, and give them the first leads you have in their territory so they win early.
5. Joint marketing rules. Which assets they may change, how co-branded materials are approved, and how any shared marketing fund is spent and reported.
6. What you measure. Sales to end customers and active use, not only what the partner buys from you, plus registered deals, win rate and time to first sale for each new partner rep.

For medical devices, Step 9 of the MedTech Marketing Playbook covers when a distributor fits, its margin, the terms to negotiate and the kit to hand its reps, with every claim kept inside the clearance.

What changes by stage?

What mistakes should I avoid?

• Choosing partners for their name. A famous logo with no audience overlap brings attention, not buyers (Step 2).
• No written terms. Unspoken expectations turn into resentment by week three (Step 4).
• Uneven promotion. One side does the work, and both sides blame the channel (Step 6).
• Leads shared without consent. It damages trust with the people you both want to reach (Step 4).
• No shared scorecard. Without agreed numbers, every project “went well” and nothing improves (Step 8).
• Swapping full customer lists to find the overlap. Compare counts first, and share names only for accounts both sides agree to work (Step 2).