Whether you are in the automotive business complying with the ISO26262 standard, avionics business complying with the DO178B/C and DO254 guidelines or IEC62304 medical business software validation and verification are mandatory phases of your certification process. Since testing constitutes just one of many activities of these processes, you will also need to provide evidence for static analysis, coding inspection, code metrics, software requirement coverage, software structural coverage, as well as development tool impact and dependency level assessment. Depending on your required integrity level - for example the DO178 requires 28 objectives for Level D (minor failure) and up to 66 objectives for Level A (catastrophic failure) - your development activities will increase considerably.
Even when you might be developing non safety critical products and thus not be concerned by certification issues, you cannot deny that there has been for some years a trend where software is making the difference by increasing the product value more and more, both through richer features and quality. So it is only wise to consider quality with the due rigor. The process oriented standards to achieve higher quality, descibed above, can tie up a great deal of your development resources. However, the constraints of tight schedules and clients, paying only for implemented features, will not change. This is where we could step in and support you in some or all of these activities.
And remember: It is easy to find a bug when the product is already completely built, but it's very expensive to fix it.