Smartlead vs Lemlist: Which Is Better for Agencies?
Smartlead was built for agencies. Lemlist was built for personalization. We compare both for multi-client cold email operations.
Two Platforms, Two Philosophies
If you run a cold email agency, your platform choice matters more than it does for solo senders. You need client management, white-labeling, unified inboxes across accounts, and the ability to scale without breaking things. Smartlead and Lemlist are both popular choices, but they were built with different priorities.
Smartlead was designed for agencies from day one. Lemlist was designed for personalized outreach and later added agency features. We manage campaigns for 12 clients and have run both platforms in parallel. Here is what matters.
Agency Feature Comparison
| Agency Feature | Smartlead | Lemlist |
|---|---|---|
| White-label portal | Yes (Pro plan) | No |
| Client sub-accounts | Yes (native) | Yes (Team plan) |
| Unified master inbox | Yes (all client replies) | Yes (per account) |
| Email accounts per plan | Unlimited | Limited (3-15 by plan) |
| Per-client reporting | Yes | Yes |
| API for automation | Pro plan | All paid plans |
| Webhook support | Yes | Yes |
| Client-facing dashboard | White-label included | Not available |
The white-label portal is Smartlead's killer feature for agencies. You can give each client their own branded login where they see campaign performance, reply threads, and lead status — all without seeing Smartlead's branding. Lemlist does not offer this. If client-facing reporting matters to your agency, Smartlead wins by default.
Deliverability for Agency Campaigns
We ran identical campaigns across 8 client accounts on both platforms:
| Metric (avg across 8 clients) | Smartlead | Lemlist |
|---|---|---|
| reply rate | 58.3% | 56.1% |
| Reply rate | 3.4% | 4.1% |
| Bounce rate | 1.2% | 1.5% |
| Spam rate | 3.0% | 3.9% |
Smartlead had slightly better raw deliverability. Lemlist had a higher reply rate, which we attribute to personalization features being used in some campaigns. The pattern is consistent with what we see in every test: warmup network size drives deliverability, personalization drives reply rates.
Pricing at Agency Scale
Here is what each platform costs for a typical agency managing 8 clients with 10 inboxes each (80 total inboxes):
Smartlead Pro: $94/month. Unlimited email accounts. White-label included. 30,000 active leads. For 80 inboxes and 8 clients, this covers everything.
Lemlist at equivalent scale: You would need the Outreach Scale plan at $159/month for 15 sending emails — but 80 inboxes far exceeds this. You are looking at multiple accounts or Enterprise pricing, which starts around $400-500/month for comparable scale.
At agency scale, Smartlead costs roughly $94/month where Lemlist costs $400-500/month for the same capacity. That is a 4-5x difference. For an agency managing margins on client retainers, this matters.
Sending Features: Day-to-Day Usage
Both platforms handle the basics well: multi-step sequences, A/B testing, spintax, custom tracking domains, and reply detection. The differences are in the details:
Smartlead advantages: Faster campaign cloning across client accounts. Better inbox rotation logic (in my experience, it distributes sends more evenly). Master inbox that aggregates replies from all clients in one view. Native integration with most infrastructure providers via SMTP/IMAP.
Lemlist advantages: Personalized image insertion (prospect name/company on screenshots). Custom landing pages per prospect. Multichannel sequences (email + LinkedIn + calls). Better email template editor with more formatting options. Lemwarm warmup with reputation scoring.
The Multichannel Question
Lemlist is the only platform in this comparison that natively supports LinkedIn outreach steps alongside email. For agencies whose clients need multichannel, this is a real differentiator. You can build sequences that: send an email on Day 1, view the prospect's LinkedIn profile on Day 3, send a connection request on Day 5, follow up with a LinkedIn message on Day 8, and send a final email on Day 10.
Smartlead is email-only. If you want LinkedIn outreach, you need a separate tool like HeyReach or Waalaxy. This adds cost and complexity but also gives you best-in-class tools for each channel rather than a single platform doing everything.
Client Onboarding and Management
From an agency operations perspective, Smartlead makes onboarding new clients simpler. Create a sub-account, connect their inboxes, import leads, and launch. The white-label dashboard means clients can log in and check results without you sending manual reports.
Lemlist requires more setup per client, especially if you are using personalized images or landing pages. The initial campaign build takes longer, but the output quality is higher. For agencies that charge premium retainers and promise personalized outreach, Lemlist's features justify the extra setup time.
Infrastructure Recommendations for Agencies
Regardless of which platform you choose, agency infrastructure should follow these rules:
- 3 inboxes per domain, never more
- 15-20 sends per inbox per day maximum
- 60/40 Google Workspace to Outlook split
- Pre-warmed accounts to avoid the 2-3 week warmup delay for new clients
- Separate domains per client — never share domains across clients
- 14 days minimum warmup before any campaign sends
We use Puzzle Inbox for all client infrastructure. Pre-warmed accounts mean we can onboard a new client and start sending within 48 hours instead of waiting 3 weeks for warmup. At $0.35 per Outlook inbox and $3-4.50 per Google Workspace inbox, the infrastructure cost per client is minimal.