Build with us: Build an AI SDR for Lead Qualification at Scale
The SDR bottleneck: why speed-to-lead determines revenue
Research consistently shows that the probability of qualifying a lead drops by 80% if follow-up takes more than 5 minutes from form submission. Most companies take 40–90 minutes for first contact. AI voice agents eliminate this gap: Persistence can be configured to call a new lead within 30 seconds of form submission, 24 hours a day, 7 days a week. The human SDR receives a warm lead summary after the AI has confirmed budget, authority, need, and timeline — and schedules a demo if appropriate.
Designing your qualification framework
Before building your agent, define what "qualified" means for your business. A common framework is BANT: Budget (do they have money to spend?), Authority (are they the decision maker?), Need (do they have a problem your product solves?), and Timeline (are they ready to buy within a reasonable window?). Each BANT element maps to one or two conversational questions your agent asks naturally. The agent collects responses, evaluates them against your qualification criteria, and routes accordingly — to a meeting booking flow, a disqualification message, or a transfer to a human SDR for edge cases.
Triggering calls from form submissions
Connecting Persistence to your lead capture system takes about 20 minutes. In HubSpot or Salesforce, create a workflow that triggers when a new lead is created and calls your Persistence outbound API with the contact's phone number and metadata. In Zapier or Make (Integromat), create a scenario that watches for new rows in your CRM or spreadsheet and triggers the same API call. The API call payload includes the contact's name, company, and any pre-known context to inject into the agent. Speed-to-call after that is under 30 seconds.
Handling objections and edge cases
The most common failure modes for SDR agents are: lead who isn't ready and feels pressured, lead who asks a deep product question the agent can't answer, and lead who speaks a language other than the primary one. For the first: configure your agent to be consultative, not pushy — it should offer value (a free resource, a relevant case study) before asking qualification questions. For the second: train a clear handoff path to human SDR, with a warm transfer that includes the transcript so far. For the third: Persistence supports 29 languages natively with automatic language detection at call start.
The ROI of an AI SDR
A human SDR can make 40–60 calls per day and qualify perhaps 15–20 leads. A Persistence AI SDR can run 500–5,000 simultaneous calls and qualify thousands of leads per hour, at a cost of $0.08–0.15 per minute of call time. For a B2B company with a $50,000 ACV where a 10% improvement in qualified pipeline translates to significant revenue, the economics are overwhelming. Customers running Persistence for SDR automation consistently report 3–5x more qualified opportunities per SDR dollar spent compared to human-only or email-only outreach.
