Short answer: Outsourced SDR companies supply sales development reps who prospect for you, usually by phone and email, so you do not have to hire them yourself. This page lists seven of them and describes each using only what it says on its own website. It also includes Next Reply, which is not an SDR staffing firm. We are a cold email agency, listed as an alternative for teams that want conversations without adding reps.
- What this is: seven SDR outsourcing companies and one alternative, not ranked.
- How it was built: each description comes from the company’s own site.
- What to decide first: whether you need people on the phone or a campaign that produces replies.
Who wrote this: Next Reply publishes this page and is included in it. This list is not a ranking. After Next Reply, the SDR companies appear in alphabetical order. Each description uses only what the company says about itself on its own website, which we opened while writing this page. We have not tested these companies and we do not repeat review scores, client counts or results. Check each site yourself, because offers change.
What do outsourced SDR companies do?
A sales development rep, or SDR, finds prospects, contacts them and passes interested ones to a salesperson. An outsourced SDR does that work as an employee of an outside firm. The SDR company recruits, trains and manages the reps, and you pay a fee instead of a salary. Our guide to the outsourced SDR model compares it with hiring in-house.
An SDR agency differs from a channel specialist in what you buy. With an SDR company you are buying people and their time, often with phone calls as the core activity. With a cold email agency you are buying a campaign. Both aim at the same result, a conversation with a buyer, but the cost and the management effort are different. Broader options are covered in our guide to sales outsourcing.
Which outsourced SDR companies should you compare?
Next Reply is listed first as the alternative. The seven SDR firms follow in alphabetical order.
| Company | Main channel | Stated focus |
|---|---|---|
| Next Reply | Cold email only | Done-for-you campaigns |
| Callbox | Phone, email, LinkedIn, events | Lead generation and SDR teams |
| CIENCE | Managed SDRs, phone, email | Qualified sales meetings |
| memoryBlue | Phone | Technology companies |
| Operatix | SDR teams | B2B software vendors |
| SalesFocus | Outsourced sales teams | US-based SDR teams |
| SalesHive | Phone, email | Booked meetings |
| SalesRoads | Phone, email | Appointment setting, SDRs |
Next Reply
Next Reply is not an SDR company and does not supply reps. Next Reply is a done-for-you cold email agency for B2B companies. Plans are Startup at $1,500 a month for up to 1,000 prospects, Growth at $3,000 a month for up to 2,500, and Scale at $6,500 a month for 5,000 or more. Every plan includes list building, sending infrastructure setup, copy, follow-ups and monthly reporting. Growth adds reply qualification, meeting booking and a monthly strategy call. A campaign goes live in 14 days, and you approve every list before anything sends. Next Reply does cold email only. We do not offer cold calling, LinkedIn outreach, paid ads or SEO. We are on this page for buyers who are weighing an outsourced SDR against a different way to start conversations. If you need people making calls, look at the firms below.
Callbox
Callbox says it is a B2B lead generation agency and appointment setting company. Its site lists lead generation, appointment setting, account-based marketing, event and webinar marketing and outsourced SDR teams. It says it reaches prospects by phone, email, LinkedIn, chat and events, and names software, SaaS, cloud and healthcare among its industries.
CIENCE
CIENCE says it builds qualified sales meetings through managed SDR teams. Its site lists outbound and inbound SDR teams, appointment setting, cold calling, a cold email agency service with managed sending and verified lists, and data services. It says it works with B2B teams from startups to enterprises.
memoryBlue
memoryBlue lists SDR, ADR and AE services covering the full deal cycle, along with marketing, recruitment and training. It says it works only in B2B, specifically with technology and professional-services companies, and that most of the meetings it books come from the phone. Its site lists offices that include Washington, DC and London.
Operatix
Operatix describes itself as an outsourced SDR agency specialized in helping B2B software vendors. Its site lists outbound sales development, inbound lead qualification, marketing acceleration and channel acceleration, and offices in London, California, Texas and Singapore.
SalesFocus
SalesFocus describes itself as a B2B sales outsourcing company. It says it builds and manages outsourced SDR teams of United States-based sales professionals for prospecting, outreach and lead qualification. Its site also lists outside sales, inside sales, sales management and sales recruitment.
SalesHive
SalesHive describes itself as a B2B sales agency that books qualified meetings, with US-based SDRs running cold calling and email on its own AI platform. Its site lists lead generation, appointment setting, SDR outsourcing, sales outsourcing and list building.
SalesRoads
SalesRoads describes itself as a sales outsourcing agency. Its site lists appointment setting, lead generation, SDR outsourcing, inbound appointment setting and account reactivation, using outbound calling and personalized email prospecting. The industries it names include manufacturing, SaaS and healthcare, and its footer lists a Boca Raton, Florida address.
How do you choose an SDR company?
SDR outsourcing companies look alike on a list. They separate once you ask how the work is done.
- Which channel reaches your buyer? Some buyers answer email. Others are easier to reach by phone or at events. Pick the channel first, then the company.
- Will you see the list before it is used? If not, you cannot control who hears from your company.
- Who handles replies and how is a qualified lead defined? Get the definition in writing before you start.
- Who owns the data, domains and accounts if you leave? Ask before you sign.
- What is in the report? You want contacts reached, replies and real conversations, not only activity counts.
- What are the terms? Read the fee model, the cancellation clause and the renewal clause.
- Who are the reps? Ask where they are based, whether they work only on your account, and what happens when one leaves.
- How long is the ramp? Ask when the company expects the first meetings and what it measures before then.
Be careful with any company that guarantees a number of meetings or deals. Nobody controls how your market responds. A list like this one can tell you who exists and what each says it does. Only a conversation, a written proposal and reference calls can tell you whether a company is right for you.
Before you compare quotes, price the in-house option. The SDR cost calculator lets you enter salary, tools and management time. For the numbers worth tracking once work starts, see our guide to outbound sales metrics.
Not sure you need a full SDR team yet? Tell us who you sell to. We will tell you honestly whether cold email could open the conversations you need, or whether an SDR firm is the better fit. Ask us →
Before you compare, see how B2B appointment setting services work, what appointment setting costs, whether an AI SDR is an option, and how to hire an appointment setter in-house. For meetings booked from cold email, see our appointment setting services.
Frequently asked questions
Is Next Reply an outsourced SDR company?
No. Next Reply is a cold email agency. We run email campaigns and do not supply reps or make calls. We are included here as an alternative.
Are these SDR companies ranked?
No. After Next Reply, they are in alphabetical order. We did not score them, and the descriptions come from each company’s own website.
What does an outsourced SDR cost?
We do not quote other companies’ prices here. Fees depend on the number of reps, the channels and the contract. Ask each firm for a written proposal so you can compare like with like.
When does an outsourced SDR make sense?
It makes sense when your buyers respond to live conversations, when your deal size supports the cost of a person, and when you do not want to recruit and manage reps yourself.
Can I use cold email and an SDR firm together?
Yes. Some companies use email to find interested prospects and have reps or their own salespeople follow up. If you do this with two providers, make sure they are not contacting the same people.
Want conversations without hiring reps?
Next Reply runs done-for-you cold email for B2B companies, starting at $1,500 a month. A campaign goes live in 14 days and you approve every list before anything sends. See the plans or tell us who you want to reach.