The question comes up at every PI marketing budget meeting: should we keep buying from shared aggregators, or pay more for exclusive leads? Most firms answer it by comparing cost per lead. That is the wrong comparison.
A shared aggregator lead costs $30. An exclusive digital lead costs $200. The math looks obvious. But the “cheaper” lead often ends up costing more per signed case — sometimes by a factor of two or three. And the “expensive” exclusive lead sometimes delivers the lowest cost per case in the entire vendor portfolio.
This post breaks down the actual economics — what shared and exclusive leads cost at the case level, what drives the difference, and how to build the comparison that actually tells you which model is working for your firm.
What “Shared” and “Exclusive” Actually Mean
Shared leads come from aggregator networks — platforms like Nolo, LegalMatch, AllLaw, or FindLaw lead forms — where a single prospect inquiry gets sold to multiple law firms simultaneously. You might be one of three, five, or even eight firms receiving the same lead at the same moment. The prospect did not choose you. They filled out a form, and your firm was on the distribution list.
Exclusive leads are delivered to one firm only. Self-generated leads — from your Google Ads campaigns, Google Local Services Ads (LSA), or direct web traffic — are exclusive by nature because the prospect came to your site and contacted you directly. Some vendors also sell “exclusive lead packages” where they generate leads through their own advertising and route each inquiry to a single buyer.
The difference sounds simple. It has enormous consequences for conversion rates, intake workload, and ultimately cost per case.
The CPL Comparison That Misleads Most Firms
Here is what PI firms typically see when they compare shared and exclusive leads on the metric most vendors report:
Shared Aggregators
$25–$75
Nolo, LegalMatch, AllLaw — per lead delivered
Exclusive Digital Vendors
$100–$250
Vendor-generated exclusive leads, per lead
Self-Generated (Google Ads)
$150–$400
Your campaigns, exclusive by nature
On CPL alone, shared leads win by a wide margin. If that is the metric guiding your vendor allocation, you will keep spending on shared aggregators and remain confused about why your signed case numbers do not reflect the lead volume you are buying.
The problem is conversion rate. Shared leads convert to signed cases at 3–8% on average. Exclusive leads — whether self-generated or from exclusive vendors — convert at 12–25%. That difference swings the cost per case calculation entirely.
What the Cost Per Case Numbers Actually Look Like
When you follow leads through intake to signed cases, the ranking by source type shifts dramatically from what CPL suggested. Below are benchmark ranges for cost per signed case by lead source — across PI firms tracking this metric with proper attribution:
Benchmark ranges across PI firms with complete attribution. Actual results vary by market and intake conversion rate.
A few things stand out in these numbers. Google LSA — which most firms treat as a secondary channel — delivers the lowest cost per signed case in this benchmark. Shared aggregator leads, despite the low CPL, land near the middle of the range. Exclusive digital vendor leads cost more per case than self-generated Google Ads traffic. And Facebook, widely praised for low CPL, ranks second-to-last.
None of this means the rankings will hold for your firm. They are averages across many firms with different intake teams, markets, and case mixes. Your actual cost per case from each source is the number that matters — not the industry average.
Head-to-Head: Shared vs. Exclusive Across What Actually Matters
Cost per case is the headline comparison, but it is not the only dimension that determines which lead model serves your firm better. Here is how shared and exclusive leads compare across the full picture:
| Shared Aggregators | Exclusive Leads | |
|---|---|---|
| Typical Cost Per Lead | $25–$75 | $100–$400 |
| Lead Exclusivity | ||
| Prospect Intent Level | Low to moderate | Moderate to high |
| Intake Conversion Rate | 3–8% | 12–25% |
| Typical Cost Per Signed Case | $1,500–$4,000 | $2,200–$5,500 |
| Case Quality / Severity | Variable | More consistent |
| Speed to Contact Required | Critical (minutes) | Important (hours) |
| Attribution Complexity | High (shared tracking) | Moderate |
| Volume Scalability | High | Limited by market |
| Vendor Accountability | Difficult | Easier to enforce |
The nuance in that table is easy to miss. Shared leads require faster response times — because every competitor on the distribution list is calling the same prospect simultaneously. Firms that cannot reach a shared lead within five minutes of delivery lose a significant percentage of the opportunity regardless of how strong the case is. Exclusive leads give you more time, but “more time” does not mean unlimited time. Speed still matters.
The Variable That Determines Which Model Wins for Your Firm
Here is the piece most firms skip: your intake team's conversion rate on shared leads is the single most important variable in this comparison.
If your intake team converts shared leads at 10% — higher than the industry average — shared aggregators can deliver competitive cost per case even at $50–60 CPL. If your team converts shared leads at 4%, your cost per case from aggregators is almost certainly higher than exclusive sources, and you would not know it without the data.
This matters because the “shared leads are cheaper” assumption often survives for years without being tested. The CPL is visible on every invoice. The cost per case by source requires connected attribution — linking each lead through intake to a signed case and back to the vendor that delivered it.
Eighty percent of PI firms are still tracking this in spreadsheets, if at all. The ones doing it systematically discover meaningful differences between vendor types that are invisible at the CPL level.
How to Build the Comparison for Your Firm
The calculation is straightforward once the data is connected. For each lead source type, you need:
- Total spend in the period — from your invoices or vendor portal
- Total leads received — from the vendor report or your intake CRM
- Signed cases attributable to that source — from your CRM with source tags intact
- Cost per case — total spend divided by signed cases
Run this across a 90-day window. Shorter windows introduce too much noise. Longer windows may obscure recent performance shifts.
The attribution step is where most firms hit friction. If your intake CRM does not capture the lead source on each record, or if source tags fall off when records are transferred between systems, you cannot complete this calculation reliably. A dedicated lead source field that follows the record from intake submission through signing is the minimum requirement.
The RevenueScale marketing ROI platform automates this calculation by connecting your vendor spend data, intake records, and case management system — so you see cost per case by source in a single view rather than assembling it from three different exports.
What Firms Usually Find When They Run the Numbers
Firms that track cost per case by source type for the first time typically find one of three patterns:
Pattern 1: Shared aggregators are underperforming. The low CPL does not survive the conversion math. Cost per case from aggregators exceeds cost per case from self-generated Google leads by 30–60%. The firm has been over-allocating budget to aggregators based on invoice amounts rather than case outcomes.
Pattern 2: One aggregator is outlying. The firm uses three shared aggregators, and two of them deliver acceptable cost per case while one runs two to three times higher. Treating aggregators as a single category masked a vendor-level problem. The fix is not to cut aggregators — it is to cut the underperforming one.
Pattern 3: Self-generated traffic is the best performer. Google Ads or LSA — despite higher CPL — delivers the lowest cost per case in the portfolio. The firm has been under-investing in its own channels in favor of vendors, when the data suggests inverting that allocation would produce more cases per marketing dollar.
All three patterns are actionable. None of them are visible until you connect spend to signed cases by source — not just by lead.
The Right Question to Be Asking
The shared vs. exclusive debate is a CPL debate dressed up as a strategy debate. The right question is not “which model is cheaper per lead?” It is “which sources deliver the lowest cost per signed case — and how do I scale those while pulling back on the ones that do not?”
That question requires connected data. It cannot be answered from a vendor invoice, a CPL dashboard, or a spreadsheet that tracks leads but not cases.
If you are making this allocation decision based on CPL today, you are likely leaving 15–20% of your marketing ROI on the table. Not from spending more — from reallocating what you already spend to the sources that deliver the best case economics for your specific intake team, market, and case type mix.
See how the RevenueScale intake performance layer connects intake conversion rates by source — so your cost-per-case comparison accounts for how your team converts each lead type, not just what the leads cost to acquire.
Ready to Run the Real Comparison?
If you have been managing shared and exclusive lead budgets by CPL, the cost-per-case comparison will change how you allocate. Book a demo to see how RevenueScale connects your vendor spend, intake records, and signed case data — so you know within 90 days which sources are actually working.