I dealt with this exact scenario last year when our primary SaaS vendor was acquired by a much larger competitor. The acquiring company immediately tried to migrate us to their enterprise pricing tier, which was roughly 3x what we had been paying.
Our in-house counsel reviewed the contract and found a critical provision: it contained an anti-assignment clause that required our written consent before the contract could be assigned to a successor. Under common law, most courts distinguish between an outright assignment and a transfer by operation of law through a merger. The distinction matters enormously.
In our case, the acquisition was structured as an asset purchase rather than a stock merger, which meant the anti-assignment clause applied. We used this leverage to negotiate a two-year price lock at our original rates as a condition of consenting to the assignment.
My advice: pull out your original contract immediately and look at the assignment clause. Check whether it carves out exceptions for mergers, acquisitions, or changes of control. Under UCC Section 2-210, the default rule for goods contracts allows delegation of duties unless the other party has a substantial interest in having the original party perform.