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Cold email sendingLast reviewed

Instantly vs Smartlead for Clay outbound

Both tools send cold email from many connected mailboxes, warm those mailboxes up, and rotate sending across them. If Clay builds and enriches your lists, either one can be the sending layer. They are closer than most comparisons admit, so the choice comes down to packaging: how each sells lead data, agency features, and sending infrastructure.

Disclosure: some vendor links on this page may be affiliate links. If you buy through one, we may earn a commission. Commissions do not decide our verdicts. Read the disclosure

At a glance

Instantly

Best for

Teams that want sending, a lead database, and AI reply handling from one vendor

Instantly pairs an outreach plan (unlimited email accounts and warmup) with a separate credits plan for its B2B lead database, waterfall email enrichment, and AI research agents. Bundles combine the two.

Visit InstantlySee current pricing

Smartlead

Best for

Agencies and teams that need client workspaces, white-label, or a la carte infrastructure

Smartlead plans include unlimited email accounts with automatic rotation, a unified master inbox, and verified prospect emails. Client workspaces, white-label, verification, dedicated servers, placement testing, and calling are sold as add-ons.

Visit SmartleadSee current pricing

Feature comparison

Based on each vendor's own pricing and product pages. Plan contents change, so confirm the tier that includes a feature before you buy.

Mailboxes and warmupInstantlyUnlimited email accounts and warmup on outreach plansSmartleadUnlimited email accounts on every plan, with warmup and rotation across mailboxes
What sets your tierInstantlyUploaded contacts and emails sent per monthSmartleadContacts stored and emails sent per month
Lead dataInstantlyB2B lead database, waterfall email enrichment, and research agents, paid with creditsSmartleadVerified prospect emails included on plans, with email verification as an add-on
RepliesInstantlyUnibox for replies, with an AI reply agent on higher tiersSmartleadUnified master inbox across all mailboxes
Agencies and clientsInstantlyTeam member invites; white-label is not listed on the pricing page, so ask before you buySmartleadClient workspaces from the Pro plan up, with white-label as a per-workspace add-on
InfrastructureInstantlyEmail account purchase, inbox placement testing, and private server and IP rotation on the top outreach tierSmartleadMailbox purchase, dedicated servers, and inbox placement testing as add-ons
Leads from ClayInstantlyClay's Instantly integration, or the Instantly API (listed from the Hypergrowth tier)SmartleadClay's Smartlead integration, or the Smartlead API and webhooks
CallingInstantlyNo dialer listed on the pricing pageSmartleadSmartDialer add-on for calls

Pricing model

We do not publish prices because they change. Each card links to the vendor's pricing page with the current numbers.

How Instantly charges

Separate Outreach and Credits subscriptions, or bundles of both. Outreach tiers are set by uploaded contacts and emails sent per month. Credits pay for lead database searches and enrichment. Mailboxes and warmup are not charged per account.

See current Instantly pricing

How Smartlead charges

Tiered monthly plans set by contacts stored and emails sent per month, with unlimited email accounts. White-label client workspaces, email verification, mailbox setup (SmartSenders), dedicated servers (SmartServers), inbox placement testing (SmartDelivery), and the dialer are priced separately.

See current Smartlead pricing

Both tools price by contacts and monthly sends, not by mailbox. You still pay your email provider (Google Workspace, Microsoft 365, or an SMTP host) for every mailbox you connect.

Playbooks that fit each tool

Step-by-step workflows from this site that name the tool or map cleanly onto it.

Instantly

Smartlead

Verdict

Pick Instantly if

  • You want lead search and enrichment inside the sending tool, with Clay optional
  • You want a unified inbox and an AI reply agent from the same vendor (check which tier includes them)
  • You send for your own company rather than managing many client accounts
  • You would rather buy one bundle than assemble separate add-ons
Visit Instantly

Pick Smartlead if

  • You are an agency and need a separate workspace, or a white-labeled view, for each client
  • You want to add dedicated servers, placement testing, or calling only when you need them
  • Clay already sources and verifies your leads and you mainly need a sending layer with an API
  • You want sending and a power dialer from the same vendor
Visit Smartlead

Bottom line

If Clay already does your list building and enrichment, both tools will send your campaigns well enough that agency needs and add-ons should decide. Agencies with many clients will find Smartlead's workspace and white-label options a closer fit. Teams that want lead data and AI reply handling bundled with sending will find more of that packaged in Instantly.

Frequently asked questions

Is Instantly or Smartlead better for Clay outbound?
Neither is better across the board. Both accept leads from Clay through an integration or API and both send from unlimited connected mailboxes. Choose Smartlead if you run outbound for several clients and need separate workspaces or white-label. Choose Instantly if you want lead search, enrichment, and an AI reply agent bundled with sending.
Do Instantly and Smartlead charge per mailbox?
No. Both pricing pages state that email accounts are unlimited. Tiers are set by contacts and monthly email volume instead. You still pay your email provider for each mailbox and domain you use.
How much do Instantly and Smartlead cost?
Plans and prices change, so we do not quote them here. See current pricing on the Instantly and Smartlead pricing pages linked on this page, and compare the tier that matches your monthly contacts and sends.
How hard is it to switch from one to the other?
Both connect the same Google, Microsoft, and SMTP mailboxes and accept CSV or API lead imports, so switching mostly means reconnecting mailboxes, rebuilding sequences, and pointing your Clay push step at the new tool. Plan for a warmup period on any new mailboxes.

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