The best cold emailtools for agenciesin 2026.

Most cold email tools are built for a single rep, not an agency. We ranked the ones with real client management: separate client workspaces, white-label portals, per-client reporting, and what each client actually costs you.

7 agency tools compared · Last updated June 2026 · No sponsored placements

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Our top picks

No single tool wins for every agency. Here is the short version before the detail.

Best overallHotHawkUnlimited client workspaces and a white-label portal on your own domain, with no per-client fee.Best value for agenciesSaleshandyUnlimited clients and white-label included, from $25 a month, if you can live with outsourced warmup.Best premium infrastructureEmailBisonSingle-tenant, isolated sending per client. Built for the top end of agencies, priced to match.Best usage-based pricingWoodpeckerA genuine agency panel with white-label, on a usage-based, deliverability-first tool with unlimited seats.Best mature white-labelSmartleadThe agency default for a reason: client sub-accounts and white-label that have been battle-tested.

How we tested

Our method.

We judged every tool on what an agency actually needs to run cold email for clients: separate client workspaces, a white-label portal on your own domain, per-client visibility and reporting, what each client adds to your bill, and the deliverability your clients depend on.

Pricing and agency features come from each provider’s own website as of June 2026, cross-checked against our head-to-head pages. The weak points reflect themes in public user reviews, not absolute statements of fact. HotHawk is our own product, so we have put it first, and we have been straight about where every other tool genuinely beats us. No tool paid to be on this list, and there are no affiliate links.

The agency tools, side by side.

The agency features first: workspaces, white-label, reporting and what each client costs. The full write-up on each tool is underneath.

Cold email tools compared feature by feature.
Tool	Client workspaces	White-label portal	Per-client reporting	Per-client cost	From	Free trial
HotHawkOur pick	Unlimited	ClientBox		Included	$97/mo	7-day
Smartlead	Sub-accounts			$29/client	$39/mo
EmailBison	Unlimited			Included	$599/mo
Saleshandy	Unlimited			Included	$25/mo	7-day
Woodpecker	Agency panel			Usage-based	$24/mo
Instantly	Workspaces	Limited	Limited	Agency tier	$47/mo
Reply.io	Agency tier	Add-on		Agency tier	$89/user

Pricing and agency features from each provider’s own website and our head-to-head pages, accurate as of June 2026. "Limited" means the feature exists but is not a mature, isolated per-client portal. "Agency tier" means client management sits on a higher agency plan. Figures change, so check each provider for the latest.

The 7 best cold email tools for agencies, ranked.

HotHawk

from $97/moOur pick

Unlimited client workspaces and a white-label portal on your own domain, included on Scale.

Where it wins for agencies. ClientBox gives every client their own white-label workspace on your own domain, branded as you, so clients never see HotHawk. Adding a client never adds to your bill, because workspaces are unlimited and included on Scale, not a per-client add-on. You choose per client which replies and which reporting they see, run a shared opportunities board with them, and let them upload their own blocklist. The Master Inbox catches every reply across all of it, including the forwarded and CC’d ones, and routes each to the right rep.

The trade-off. White-label sits on the Scale plan at $247 a month, so the $97 Starter is a single-workspace plan. HotHawk does email outreach only, with no LinkedIn or multichannel sending, no autonomous AI SDR, and no built-in lead database, so you bring your own leads.

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Smartlead

from $39/mo

The mature agency default: isolated client sub-accounts and white-label that have been run hard.

Where it wins for agencies. Client sub-accounts come with their own branding, isolated billing, API tokens and reply queues, plus per-client reporting, so this is the most proven white-label setup of the group. White-label runs on a custom domain, and unlimited mailboxes with warmup on every plan keep client deliverability healthy.

Where it falls short. White-label is a $29 per client, per month add-on that starts from the Pro plan, so the agency cost climbs with every client you sign. Support and reliability are its most common complaints, and there is a real learning curve before the agency panel clicks.

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EmailBison

from $599/mo

Single-tenant, white-label client sub-accounts with dedicated IPs for each client.

Where it wins for agencies. Every client gets an isolated workspace on its own dedicated IPs and single-tenant infrastructure, white-labelled with a custom domain and branding, with unlimited workspaces and no per-seat fees. For an agency that sells deliverability as the product, that isolation is the real draw, backed by white-glove onboarding from the founding team.

Where it falls short. It is $599 a month flat, invite-only, and there is no free trial to test it. The build is aimed squarely at the top end of agencies rather than every team, there is no lead database, and independent reviews are almost non-existent, so you are committing largely on trust.

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Saleshandy

from $25/mo

Unlimited clients and white-label included, at about the lowest entry price of any agency tool here.

Where it wins for agencies. Unlimited client accounts come free, with white-label across a custom domain, logo, favicon and company name, plus client roles and per-client reporting. There are no per-client fees, unlimited email accounts on every plan, and a built-in lead finder, which makes it the value pick for an agency watching margins.

Where it falls short. Warmup is outsourced to a separate tool, TrulyInbox, with its own login, and reviewers say it weakens past 50 inboxes. The $25 Starter feature-gates CRM, A/Z testing and unlimited team members behind the $69 Pro plan, and the real bill climbs once you add the lead finder and placement testing.

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Woodpecker

from $24/mo

A deliverability-first tool with a genuine agency panel and white-label for clients.

Where it wins for agencies. The agency panel gives each client a separate prospect database, bulk campaign actions, centralised billing, automated client domain audits and a global blacklist, all white-labelled for your clients. Unlimited mailboxes and seats come free, pricing is usage-based on the prospects you contact rather than per seat, and deliverability is the focus of the whole tool.

Where it falls short. Warmup runs through a third party, Mailivery, that users find opaque, billing after cancellation is a recurring complaint, and the API and MCP server sit behind a paid add-on.

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Instantly

from $47/mo

Agency workspaces and a big ecosystem, but the white-label is not a mature per-client portal.

Where it wins for agencies. A 450M-record lead database, website visitor tracking and a fast setup make it a strong all-in-one for an agency that wants prospecting and sending in one place. Agency workspaces let you run several client campaigns without a per-seat charge, and the dedicated Agency plan bundles the volume for it.

Where it falls short. White-label is limited, and a well-documented gripe is that clients can see every campaign in a workspace, so this is not the isolated per-client portal Smartlead or HotHawk give you. Pricing is modular so the real cost climbs, the Agency plan is $555 a month, and reviews flag reliability wobbles.

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Reply.io

from $89/user

Dedicated agency tiers with multi-tenant client management and white-label as an add-on.

Where it wins for agencies. The Core, AI SDR and Hybrid agency tiers handle unlimited clients with multi-tenant management, and white-label rebranding on a custom domain is offered. Email, LinkedIn, calls and SMS run in one workflow with a billion-record database and Jason AI, so it suits an agency selling multichannel rather than email alone.

Where it falls short. Reviewers say the white-label is less developed than Smartlead’s, and it is offered as an add-on rather than baked in. The base product is billed per seat at $89 with channel add-ons that stack fast, warmup is outsourced, and billing friction is the strongest theme in its reviews.

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A few popular tools we left off.

Some well-known cold email tools are built for individual reps, not agencies, so they have no white-label client portal to log clients into. They are good tools, just not for this job, so we have kept them out of the ranking rather than pad it. Here is each one and why.

Lemlist: a strong multichannel tool, but no white-label client portal.
Mailshake: simple and stable, with the client expected to own the account, not a portal.
Klenty: deep CRM sync for sales teams, with no agency white-label.
Apollo: a database with sending attached, and a credit model agencies find unfriendly.
Outreach: an enterprise sales platform with no warmup and no agency features.

Cold email for agencies, answered.

What is the best white-label cold email tool for agencies?

HotHawk, for most agencies. ClientBox is a white-label client portal on your own domain with unlimited client workspaces, included on the Scale plan, so a new client never adds to your bill. Smartlead has the most mature white-label of the rest, though it charges $29 per client a month, and EmailBison gives each client isolated infrastructure if you can justify $599 a month. The honest answer depends on budget and how many clients you run.

What is the cheapest cold email tool for agencies?

Saleshandy and Woodpecker have the lowest entry prices, from about $24 to $25 a month. Saleshandy includes unlimited clients and white-label with no per-client fee, which makes it the value pick, while Woodpecker is usage-based on the prospects you contact, with an agency panel and white-label for clients. HotHawk is $247 a month on Scale for unlimited white-label workspaces, which often works out cheaper than the per-seat or per-client tools once you pass a handful of clients.

What is ClientBox and how does HotHawk handle clients?

ClientBox is HotHawk’s white-label client portal, built for cold email agencies. Each client gets their own workspace on your own domain, branded as your business, so they never see HotHawk. You decide per client which replies and reporting they see, run a shared opportunities board with them, and let them upload their own blocklist. Workspaces are unlimited and included on Scale, so there is no per-client fee, and your team works across every client from one login.

How much does a cold email agency cost?

Running a cold email agency mainly means paying for your sending tool, your mailboxes and domains, and lead data, before any team costs. A white-label tool runs from about $25 a month at the bottom end up to $599 a month for isolated per-client infrastructure, and per-client tools add a fee for every client you sign. On top of that, agencies budget for mailboxes and domains for each client and for verified lead data, so the real monthly cost scales with how many clients you take on.

Is cold emailing illegal in the USA?

No. Cold email is legal in the United States under the CAN-SPAM Act, as long as you follow the rules: use accurate header and "from" information, do not use deceptive or misleading subject lines, identify the message as an advert where required, include a valid physical postal address, and give a working opt-out that you honour promptly. This is general information rather than legal advice, and other countries and states have their own rules, so check what applies to the people you are contacting.

Comparison based on publicly available information from each provider’s website, accurate as of June 2026. Pricing and features change, so check each provider for the latest. Weak points reflect themes in public user reviews, not absolute statements of fact. All product names are trademarks of their respective owners; HotHawk is not affiliated with or endorsed by them. Last updated June 2026.

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