Can a company be sued for breach of contract if they delay project delivery?

Yes, delayed delivery beyond the agreed timeline can amount to a breach of contract, and you may be entitled to remedies including damages for the losses you've actually suffered as a result of the delay, provided your contract doesn't contain a force majeure or similar clause that would excuse the vendor's delay under the specific circumstances involved.

If your contract specifies a liquidated damages clause for delay (a pre-agreed amount per day or period of delay), you may be able to claim that amount directly without needing to separately prove your exact actual loss, which can make the claim considerably more straightforward.

Where no such clause exists, you would need to establish and quantify your actual losses caused by the delay, which can require more detailed evidence. Before pursuing legal action, it's worth checking whether your contract has a dispute resolution or arbitration clause, since that may determine the proper forum for resolving this. A commercial lawyer can review your specific contract and advise on the strongest available remedy.