Sending APIs, where the API is usually an afterthought

Most sending tools price by mailbox, which punishes exactly the setup that keeps you out of spam. Smartlead does not: every plan carries unlimited email accounts and the meter is on sends and stored contacts instead. The API and webhooks are not on the entry plan though, and start at Pro.

• Unlimited email accounts on every plan, no per-mailbox charge
• API and webhooks from the Pro plan upward. Base has neither
• Three separate counters: contacts, sends and verified prospect emails
• Three analytics endpoints are capped at 10 calls a minute whatever the plan

Every enrichment pipeline eventually has to land somewhere a rep will look. HubSpot gives you full CRM object access on the free tier, which makes it the cheapest place to put the rows you just paid for.

• CRM objects, associations, properties and workflows over REST
• Two official MCP servers, one remote for the CRM, one local for builds
• Free tier includes API access, not just the interface

Pipedrive is the CRM most small sales teams already run, and its API is priced into the seat rather than metered. What it does meter is complexity: every endpoint has a token cost and every account has a daily budget, so a search costs twenty times what a read does.

• No per-call charge. API access comes with every paid seat
• Daily budget is 30,000 tokens times a plan multiplier times seats
• A search costs 40 tokens, a single read costs 2

Salesforce has the deepest API surface of any CRM in this directory, and the only one you have to buy on purpose. On Pro Suite the Web Services API is a $25 per user per month add-on; from Core it is included. What you get then is not one API but more than a dozen, metered as a daily org budget rather than a request rate.

• API access costs $25/user/mo extra on Pro Suite, included from Core
• Daily org budget: 100,000 calls plus 1,000 per Enterprise license
• REST, SOAP, Bulk 2.0, GraphQL, Metadata, Tooling and Pub/Sub

Instantly splits the product in two and sells each half on its own: an Outreach plan with unlimited email accounts and unlimited warmup from $47 a month, and a Credits plan for the 450M contact database and waterfall enrichment. The bundles are the two added together.

• Unlimited email accounts and warmup on every Outreach plan
• Metered on uploaded contacts and emails, not mailboxes
• 100 requests a second and 6,000 a minute, per workspace

Salesloft publishes no price and documents its rate limit better than almost anyone here. The limit is 600 cost per minute for the whole team, every endpoint has a cost, and asking for page 501 of a list costs 30 of your 600 instead of 1.

• 600 cost a minute, shared across every integration on the team
• Deep paging is charged: page 501 and beyond costs 30 instead of 1
• No published price. The pricing page is titled Talk to Sales

Reply.io meters active contacts rather than emails, and the price flips shape partway up the slider: $49 a user at 1,000 contacts, then $159 for unlimited users at 10,000. It is also the only sender here that publishes the formula behind its unlimited mailbox claim, at one mailbox per 40 active contacts.

• Unlimited users from the 10,000 active contact tier upward
• Fair usage policy publishes a mailbox ceiling: contacts divided by 40
• API on every plan, but v1 and v2 allow 15,000 calls a month against v3's 150,000 a week

Dripify prices by LinkedIn account rather than by volume, because LinkedIn itself is the constraint: the plan you pick sets your daily connection requests and messages. The API, webhooks and an MCP server all arrive together at Pro, with a downloadable OpenAPI spec and published rate limits, which is more than most tools in this category manage.

• One seat connects one LinkedIn account, so a team of five needs five
• Daily action ceilings are set by plan: 20 requests on Basic, 75 and up on Pro
• API, webhooks and MCP server from Pro upward. Basic has none of them

Expandi publishes exactly one plan at $99 a month with every feature in it, which makes it the simplest thing to price in this category. The integration surface is webhooks rather than a documented API: 22 outbound events, and a per-campaign URL that accepts a POST to add, pause or resume a lead. The full REST reference sits behind a login.

• One published plan, $99 a month or $79 billed annually, per seat
• 22 webhook events, from connection accepted to email bounced
• A reversed webhook per campaign adds leads with a POST, no auth header