Nebari

Everyone obsesses over the build-vs-buy decision. Entire blog posts, frameworks, decision matrices. And then the company picks "buy," signs the contract, and... nobody thinks about vendor management again until something breaks.

The build-vs-buy decision takes a week. Vendor management is a multi-year discipline. And most companies are terrible at it.

The Three Phases of Vendor Dependency

Every vendor relationship follows the same arc:

Honeymoon (months 1-6). Everything works. The vendor's sales engineer is responsive. The API does what the docs say. You tell other teams how great the tool is.

Entrenchment (months 6-24). Your team builds custom integrations, workflows, and processes around the vendor's product. Internal tooling assumes it exists. Training materials reference it. The switching cost goes up every week, and nobody's tracking it.

Dependency (month 24+). The vendor raises prices 30%. Their support quality drops. Their product roadmap diverges from your needs. And you realize that switching would require a 6-month migration project that nobody has bandwidth for. You're a hostage.

The goal of vendor management is to stay in phase one's mindset while navigating phase two's reality.

Negotiate Portability Before You Need It

The most important clause in any SaaS contract isn't the price — it's the data portability provision. Can you export all your data in a standard format? Is there an API that gives you full read access to everything you've put in? What happens to your data if the vendor gets acquired or shuts down?

Get these answers in writing before you sign. Once you're a paying customer with 18 months of data in their system, your negotiating leverage drops to near zero.

Specific things to get in the contract: bulk data export in standard formats (CSV, JSON, not proprietary), API rate limits that support a full migration, a data retention and return clause for contract termination, and no exclusivity provisions that prevent you from running a parallel evaluation.

The Abstraction Layer Discipline

Every integration with a third-party vendor should go through an abstraction layer in your code. Not because you're planning to switch — but because you might need to.

Instead of calling Vendor X's API directly from your business logic, create an internal interface that describes what you need (send email, process payment, store document) and implement that interface with the vendor's SDK. If you need to switch vendors, you write a new implementation. Your business logic doesn't change.

This costs maybe 10-15% more upfront development time. It saves months if you ever need to migrate. And it forces your team to think clearly about what they actually need from the vendor vs. what the vendor happens to offer.

Quarterly Vendor Reviews

I recommend a quarterly vendor health check for any vendor that touches production systems or core business processes. The review covers:

Financial stability. Is the vendor profitable? Have they raised a concerning amount of debt? Are they being acquired? A vendor acquisition is the single biggest risk to your roadmap — the acquirer's priorities rarely align with yours.

Product roadmap alignment. Is the vendor still investing in the features you depend on? Are they pivoting to a different market segment? Are they sunsetting the API version you're integrated with?

Support responsiveness. Track response times and resolution rates. A vendor with great support in year one and terrible support in year three is a vendor that's scaling faster than their support team.

Security posture. When was their last SOC 2 audit? Have they had any incidents? Are they transparent about their security practices?

Cost trajectory. Plot your vendor costs over time. If a vendor is increasing prices faster than the value they're delivering, start evaluating alternatives before the next renewal.

The Vendor Sprawl Problem

The other side of vendor management: too many tools. I walk into companies with 15 different SaaS tools, half of which overlap, most of which nobody fully uses. Every team picked their own tool, nobody coordinated, and now the company is paying $200K/year in SaaS subscriptions for tools that a single well-chosen platform could replace.

Run a vendor audit annually. For each tool: who uses it, what for, what would break if it disappeared, and is there overlap with other tools. Then consolidate where it makes sense — fewer vendors means fewer integrations, fewer contracts, and fewer security review surfaces.

When to Switch

Switch vendors when: the cost of staying exceeds the cost of migrating (including team disruption and opportunity cost), when the vendor's product direction is clearly diverging from your needs, when security or compliance concerns are unresolved after escalation, or when the vendor is being acquired and the acquirer has signaled changes to your tier.