Compare outreach tools.

Comparison of Quickly, Amplemarket, Apollo

Compare by	QuicklySelf-hosted cold email sequencing	AmplemarketAI-assisted prospecting and multichannel sales engagement	ApolloB2B data and sales engagement in one platform
Best for	Technical teams evaluating a self-hosted Instantly alternative	Growth-stage teams consolidating data and engagement	Teams that want data and sequencing together
Channels	Cold email	Cold emailLinkedInMultichannelContact dataSales engagement	Cold emailMultichannelSales engagementContact data
Pricing model	Open source; infrastructure costs apply	Custom quote	Free tier + paid plans
Deployment	Self-hosted Docker stack	Cloud platform + extension	Cloud platform + extension
Core capabilities	Multi-inbox sequences A/B testing Reply classification REST API	B2B data Signals Sequences AI workflows	B2B database Email sequencing Dialer CRM enrichment
Where it stands out	MIT license and data ownership Purpose-built around cold outreach	Connects data, signals, and execution Strong end-to-end outbound scope	Broad prospecting and engagement coverage Reduces the need for a separate data vendor
What to check first	Young project with a small contributor base You own updates, security, uptime, and mailbox operations	Less transparent self-serve evaluation May be too broad for a single-channel use case	Credit rules can make total cost harder to model Contact data should still be verified before high-volume sending
Source check	Repository documented · checked 2026-09-17 Read profile →Vendor source ↗	Vendor documented · checked 2026-09-17 Read profile →Vendor source ↗	Vendor documented · checked 2026-09-17 Read profile →Vendor source ↗

Best for

Quickly

Technical teams evaluating a self-hosted Instantly alternative

Amplemarket

Growth-stage teams consolidating data and engagement

Apollo

Teams that want data and sequencing together

Channels

Quickly

Cold email

Amplemarket

Cold emailLinkedInMultichannelContact dataSales engagement

Apollo

Cold emailMultichannelSales engagementContact data

Pricing model

Quickly

Open source; infrastructure costs apply

Amplemarket

Custom quote

Apollo

Free tier + paid plans

Deployment

Quickly

Self-hosted Docker stack

Amplemarket

Cloud platform + extension

Apollo

Cloud platform + extension

Core capabilities

Quickly

• Multi-inbox sequences
• A/B testing
• Reply classification
• REST API

Amplemarket

• B2B data
• Signals
• Sequences
• AI workflows

Apollo

• B2B database
• Email sequencing
• Dialer
• CRM enrichment

Where it stands out

Quickly

• MIT license and data ownership
• Purpose-built around cold outreach

Amplemarket

• Connects data, signals, and execution
• Strong end-to-end outbound scope

Apollo

• Broad prospecting and engagement coverage
• Reduces the need for a separate data vendor

What to check first

Quickly

• Young project with a small contributor base
• You own updates, security, uptime, and mailbox operations

Amplemarket

• Less transparent self-serve evaluation
• May be too broad for a single-channel use case

Apollo

• Credit rules can make total cost harder to model
• Contact data should still be verified before high-volume sending

Source check

Quickly

Repository documented · checked 2026-09-17

Read profile →Vendor source ↗

Amplemarket

Vendor documented · checked 2026-09-17

Read profile →Vendor source ↗

Apollo

Vendor documented · checked 2026-09-17

Read profile →Vendor source ↗

Use this as a shortlist, not a final verdict. Pricing and limits change, so confirm the details with the vendor and test each product with your own workflow.