Where are B2B companies losing revenue: Before the deal, during the sale, or after closing?

I came across an interesting finding, 75% of surveyed enterprises experienced SaaS implementation delays, with an average timeline overrun of 57%.

It got me thinking about a bigger problem across B2B businesses.

We invest heavily in generating leads, hiring sales teams, building products and acquiring customers. But how much revenue are we actually losing because of operational gaps?

Consider a few scenarios:

1. The missed opportunity: A prospect submits an enquiry or requests a demo, but nobody responds quickly enough. By the time someone follows up, they've already spoken to a competitor.

2. The unavailable expert: A qualified prospect wants to discuss technical architecture, integrations or implementation. The solution architect is occupied, the AE cannot answer technical questions, and the conversation loses momentum.

3. The onboarding bottleneck: The deal is signed, but implementation, documentation, training and handoffs take weeks. Customer enthusiasm starts fading before they even realise the product's value.

4. The forgotten customer: Existing customers need assistance, but follow-ups are inconsistent and important conversations fall through the cracks.

I'm curious about the experience of founders, sales leaders, customer success teams and SaaS operators here.

Three questions:

• Which of these problems costs your business the most revenue?

• Have you ever lost a deal simply because the right person wasn't available at the right time?

• Would you trust AI agents to handle initial conversations, qualify requirements, answer routine questions and coordinate with your human teams?

I'd love to hear some real-world experiences, particularly from B2B SaaS companies.

Are we investing too much in acquiring customers and too little in managing the conversations that actually convert and retain them?