Personally, I'd tell your current partners that the clients will probably look around when you leave. If the partners' response is, "That's business, we can handle it," then you're free and clear. If they get worried, then I'd try a couple of tactics to get the clients to stay... maybe something like:
- Meetings with the clients and their new contact at the company to make the clients more comfortable
- New contracts that include a price cut in exchange for exclusive rights to their business for a period of time
Whatever you decide, let us know how it turns out.
