Third-party assurance, handled by people who've graded the answers.
When your customers vet your security, vendor questionnaires, RFIs, audits, the security section of every RFP, the answers can make or break the deal. SubRosa's former auditors help you respond accurately, with the evidence reviewers actually want, so security reviews stop stalling your sales cycle.
Security questionnaires · SIG & CAIQ · RFI / RFP support · Customer audits
What is third-party assurance?
Third-party assurance is the work of demonstrating your security and compliance to the customers, partners, and regulators who vet you as a vendor. In practice, it means responding to security questionnaires like the SIG and CAIQ, RFIs, the security sections of RFPs, and customer audits, with accurate answers and the evidence reviewers expect. Done well, third-party assurance turns security from a deal-blocker into a competitive advantage. SubRosa's former auditors run that process for you, so every review moves faster than the last.
Third-party assurance, end to end.
We stand in as your security team for customer due diligence, from the first questionnaire to final sign-off.
Security questionnaire response
We complete vendor security questionnaires, SIG, CAIQ, and bespoke, accurately and in your voice, so reviewers get answers that hold up instead of red flags.
Evidence & documentation library
We build a reusable library of answers, policies, certifications, and audit reports, so every new questionnaire is faster than the last instead of starting from scratch.
RFI & RFP security support
We answer the security and compliance sections of your RFPs and RFIs, helping you win the deals where security is on the scorecard.
Customer audit & due-diligence support
When a customer wants a call, an audit, or deeper evidence, our former auditors represent your security posture and get you to sign-off.
Questionnaires answered by people who grade them.
Security questionnaires stall deals. This is how we take them off your team.
- 01
Intake and deadline triage
We take the questionnaire, the deadline and the commercial context. A response that is accurate but three weeks late has already cost the deal, so sequencing against the sales timeline is part of the job.
- 02
Evidence library build
The first engagement builds the reusable core: policies, certifications, architecture descriptions, prior test reports, standard control answers. Most of the pain in questionnaires is re-deriving the same answers repeatedly.
- 03
Drafting the responses
Answers are written to be accepted by the person reviewing them. We assess these for a living, so we know which phrasing prompts a follow-up round and which closes the item.
- 04
Gap flagging
Where a control genuinely is not in place, we say so and propose the compensating position or remediation timeline. Overstating a control in a security questionnaire is a contractual representation, and it is a bad one to get wrong.
- 05
Review and submission
You review and approve everything before it goes out. We submit or hand back, and handle the follow-up questions that almost always arrive.
- 06
Reuse for the next one
The evidence library stays yours and gets updated as things change, so the next questionnaire is a fraction of the work rather than the same exercise again.
Reviewers trust former auditors.
We've graded these answers
Our team has sat on the reviewing side of vendor assessments. We know which answers satisfy a reviewer and which ones trigger a follow-up, so we get you to 'approved' faster.
Faster, reusable responses
We turn your responses into a reusable assurance library, so the tenth questionnaire takes a fraction of the time the first one did.
Security that wins deals
Security reviews are a sales gate. We help you clear them quickly and credibly, so security becomes a reason you win, not a reason deals stall.
Your evidence and answers, ready to reuse.
Sable keeps your policies, controls, framework mappings, and evidence in one workspace, so every questionnaire response pulls from a single source of truth instead of a scramble across drives and inboxes.
- Is data encrypted at rest and in transit?Yes · AES-256 / TLS 1.2+ · evidence linked
- Is MFA enforced for all users?Yes · all users · evidence linked
- Do you have a current SOC 2 Type II?Yes · 2026 report · evidence linked
- Pen test within the last 12 months?Yes · Q1 2026 · evidence linked
- Are sub-processors disclosed?Yes · 14 listed · evidence linked
Common questions
- What is third-party assurance?
- Third-party assurance is the work of demonstrating your security and compliance to the customers, partners, and regulators who vet you as a vendor. In practice it means responding to security questionnaires like the SIG and CAIQ, RFIs, the security sections of RFPs, and customer audits, with accurate answers and the evidence reviewers expect. Done well, third-party assurance turns security from a deal-blocker into a competitive advantage.
- We assess our own vendors too. Is that the same service?
- No, and they are usually two different budgets. This service is outbound — proving your security to customers vetting you, so questionnaires stop blocking deals. Assessing the vendors who touch your data is the inbound problem, and Sable's vendor management module handles that with a live inventory, questionnaires you send, and risk scoring. Most growing companies eventually need both, and they are worth buying deliberately rather than discovering one when the other is already in flight.
- Which security questionnaires does SubRosa help with?
- SubRosa helps you respond to standardized vendor security questionnaires such as the SIG (Standardized Information Gathering) and CAIQ (Consensus Assessments Initiative Questionnaire), bespoke customer questionnaires, RFIs, the security and compliance sections of RFPs, and direct customer security audits, building a reusable evidence library so each response gets faster.
- Why outsource security questionnaire responses?
- Because they are a sales bottleneck disguised as a security task. They land on the person least able to spare the time, get answered inconsistently across deals, and stall revenue. We assess these for a living, so we know which phrasing closes an item and which triggers another round of follow-ups.
- What happens if we do not actually have a control?
- We say so, and propose the compensating control or a remediation timeline. Overstating a control in a security questionnaire is a contractual representation to your customer, and it is a genuinely bad one to get wrong — the moment it matters is the moment it is discovered.
- Do you handle SIG, CAIQ and custom questionnaires?
- Yes, along with bespoke enterprise questionnaires and the follow-up rounds that usually accompany them. The evidence library we build in the first engagement is what makes each subsequent one a fraction of the work.
- Do we keep the evidence library?
- It is yours, and it is much of the value. Policies, certifications, architecture descriptions, prior test reports and standard control answers in one place, kept current, so the next questionnaire is an assembly job rather than the same exercise from scratch.
Stop letting security questionnaires stall your deals.
Let's get your next vendor security review handled, accurately, quickly, and with evidence that holds up.