Interviewing as a service (technical interviews on demand): how it works, five vendors and what to check

Interviewing as a service, also sold as technical interview as a service, on-demand technical interviews or interview outsourcing, means an outside company's vetted interviewers run one of your interview rounds, usually the first live coding or problem-solving round, at a time the candidate books, and send you a scored report with a hire or no-hire recommendation. Your team keeps the decision and runs the later rounds. As of November 2026, vendors selling it include Karat, BarRaiser, Intervue, FloCareer and InCruiter; only FloCareer publishes a per-interview price ($25 or $30), and the fastest published turnaround is Intervue's: an interview scheduled within 120 minutes of a request and a report within 38 minutes after it.

The interviewers are usually experienced engineers or other specialists who work for the platform part-time or freelance and are paid per interview. This page covers how the model works, which round to hand over, the five vendors compared from their own sites, what to check before you buy, the cost against in-house interviews, the freelance interviewer side, and how to keep the vendor's bar aligned with yours. If your own engineers will run the interviews and you need the tooling instead, see the best technical interview platforms.

How does interviewing as a service work?

1. You define the round: role, level, languages and frameworks, and what a pass looks like. Most vendors build or adapt an interview plan from your job description and their own question library.
2. You send candidates, one at a time or in bulk, and they book a slot themselves, often in the evening or at the weekend, outside your team's working hours.
3. A vendor interviewer runs the session in the vendor's video and coding environment, usually recorded and sometimes with AI proctoring.
4. You receive a report: scores by skill, written notes and a recommendation, sometimes with the recording, a transcript and code playback.
5. Your team decides who moves to the next round, which you usually run yourselves.

Some of these vendors also sell AI-led interviews alongside human ones. Those are a different product, with a different evidence and consent picture; see what is an AI interviewer. This page is about interviews run by people.

When does outsourcing technical interviews make sense?

• Engineer time is the bottleneck. Each first-round interview costs an engineer an hour or more plus write-up time; at volume, that is real roadmap time.
• Volume spikes. A hiring push, a new office or campus season can need more interview slots than your team can staff.
• Consistency across locations or partners. One outside bar can be easier to hold steady than many internal interviewers who were trained differently.
• Specialist skills you lack in house. A first hire in a new discipline needs someone who can assess it.

It is a poor fit when:

• you hire a few engineers a year and the first technical conversation is part of selling the team;
• the role depends on deep knowledge of your product, codebase or domain that an outsider cannot assess;
• your rubric is not written down, so the vendor's bar would quietly become yours;
• your legal or security review cannot accept the vendor's data terms, such as multi-year retention or disputes governed by another country's law.

Which technical round should you outsource?

The model suits rounds that are repeatable and skills-based. It fits worst where team fit, the hiring manager's judgment and selling the role matter most.

Which companies offer on-demand technical interviews?

From each vendor's own pages, checked November 2026. "Not published" means we could not find it on the vendor's site. Vendor claims about outcomes (conversion rates, time saved) are left out because we cannot check them. Features change; confirm them on a demo before you buy.

Sources, checked November 2026: Karat Karat Interview, customer FAQ and home page; BarRaiser interview outsourcing and privacy policy; Intervue interview as a service, pricing and privacy; FloCareer interview as a service, pricing and privacy policy; InCruiter interview as a service and privacy policy.

What should you check before you buy?

Who will actually interview your candidates?

Ask for the profile of the interviewers who would take your roles, not the size of the network. Karat's FAQ says its interviewers keep being evaluated after they start and that a second interviewer rewatches in full any interview flagged for suspected cheating. FloCareer says it screens FloExperts for experience, trains them on its rubrics, and rates and audits them on client and candidate feedback; its privacy policy says customers see an interviewer's alias, relevant work history and interview history, not their name or contact details. Ask every vendor how interviewers are matched to a role, how their scoring is audited, and whether an interviewer could currently work for one of your competitors.

Whose bar is it: yours or theirs?

Karat markets its own researched interview content, Intervue lists "rubric-level customization," BarRaiser says you can ask for specific questions or let its experts write them, and FloCareer lists custom rubrics and calibration calls before interviews start. Agree in writing, before the first live candidate, which rubric the report scores against; how to keep the two bars aligned is covered below.

Recording and consent

Four of the five say they record: Karat, BarRaiser, FloCareer and InCruiter. Intervue's interview-as-a-service page does not say. Karat records every interview even if the candidate keeps the camera off. Tell candidates in the invitation who will interview them, that the session is recorded and why; some states require every party's consent, so see is it legal to record a job interview.

AI in the round

Ask exactly which parts are automated. Karat says its AI tools depend on the products you buy, can often be switched off, and never make the final hiring decision. BarRaiser lists AI evaluation that "extracts key moments" and AI cheating detection, and its FAQ says AI "can track answers, check facial expressions." InCruiter's proctoring tracks eye movement and detects "dual noise," and FloCareer's AI proctoring flags integrity issues during the session.

If a vendor's AI output scores or ranks candidates for a New York City job, check whether it counts as an automated employment decision tool: Local Law 144 bars employers and employment agencies from using one unless it has had a bias audit within one year of use, the audit information is public and candidates got the required notices (NYC DCWP, as of November 2026). For Illinois-based roles, the Artificial Intelligence Video Interview Act applies when an employer asks applicants to record video interviews and uses AI to analyze them: notice, an explanation of how the AI works and consent, all before the interview (820 ILCS 42/5). This is general information, not legal advice.

Candidate data: who controls it, where it lives, how long it stays

• Karat says it is the controller of the candidate data it collects directly, hosts data in AWS regions in Oregon and Northern Virginia, deletes candidate data on request or after at most five years, and lets customers view interview video and code playback only on its platform; after the contract ends, a customer may keep the recommendation and scores.
• BarRaiser's privacy policy says it processes personal data in AWS data centers in the United States and shares it with service providers in other jurisdictions.
• Intervue's privacy page says data "is stored for an indefinite time or as agreed in legal agreements" and that the courts of India have exclusive jurisdiction over disputes.
• FloCareer says data may be processed outside your country with safeguards such as Standard Contractual Clauses, and its pricing FAQ says candidate recordings are stored for 90 days by default, configurable per client.
• InCruiter says retention follows the client's documented instructions and the data processing agreement, and that its policy is governed by the laws of India, with the courts in Bangalore having exclusive jurisdiction.

Put retention, deletion on request, location and sub-processors in the contract; the DPA guide for recruiting software lists the clauses.

Candidate experience and accommodations

Candidates meet a stranger from another company first, so say so in the invite and explain why. Confirm the vendor can extend time or change the format when a candidate asks for a disability accommodation, and how that request reaches the interviewer. Karat says candidates can ask for accommodations before the interview, typically extended time, a screen reader or an interpreter, and that pronouns and accommodation needs go to the interviewer but are never explicitly shared with customers through its platform or report.

What does it cost, and how does it compare with in-house interviews?

As of November 2026, FloCareer is the only one of the five with a published interview price: $25 per interview on Standard and $30 on Elite, which adds "Tier 1 Interviewers." Its pricing table says "no minimum commitment" with post-paid billing, while its FAQ says the minimum commitment depends on hiring scale, that pilots are paid, and that some items, such as advanced ATS integrations, can be separate line items. Intervue prices by interview category (hypergrowth, IT services, product and MAANG companies) on quote, sells monthly credits on an annual contract, and offers two free credits on its interview-as-a-service page. Karat, BarRaiser and InCruiter quote through sales.

Example only, with made-up volumes: 30 first-round interviews a month at FloCareer's Standard price would be 30 x $25 = $750. The in-house comparison is engineer time: if each interview plus write-up takes an engineer 1.5 hours, the same 30 interviews take 45 engineer hours a month. Put your own numbers on both sides, and add the cost of a weaker hand-off if vendor-passed candidates fail your later rounds more often than your own.

What is a freelance interviewer, and how does the work look?

The people behind these services are typically working engineers and specialists who interview on the side. What the vendors' own recruitment pages say, as of November 2026:

• Intervue describes the work as freelance, lets interviewers set their own hours, pays for every interview, runs an approval process before onboarding, and estimates earnings of "$1000 - $8000 per month, depending on the time they allocate" (Intervue). That is the vendor's estimate, not a market figure.
• Karat recruits Interview Engineers who interview "all on your schedule" after a four-step onboarding: learning Karat's standards with a mentor, practice, an apprentice stage with early-career candidates, then advanced interviews from a question library (Karat). Pay is not published.
• BarRaiser says its experts are compensated for every interview, schedule around their own availability, and are screened and then trained before they interview (BarRaiser). Pay is not published.
• FloCareer asks for at least 8 years' experience and a short training session, and pays a fixed amount for every interview (FloCareer); the amount is not published. Its privacy policy tells interviewers not to record or store candidate audio or video outside its platform and to delete their notes after submitting the report.
• InCruiter pays per interview, with weekly or monthly payouts, for interviews by phone or video conference (InCruiter). The amount is not published.

If you are an engineer considering it, check your employment contract for outside-work and conflict-of-interest rules, and whether you could end up interviewing candidates for a competitor of your employer.

How do you keep scores consistent and use the vendor's report?

The risk with outsourced interviews is two bars: the vendor's and yours. Candidates who pass the vendor round then fail your onsite at a high rate, or the reverse. Six practices keep the two aligned:

1. One rubric, written by you. Give the vendor the same competencies, levels and anchored score descriptions your own interviewers use, such as the software engineer interview scorecard, and ask it to score against them rather than its own.
2. Calibrate on the same interviews. Have your interviewers and the vendor's score the same recorded or sample interviews independently, then compare and agree the differences; the agenda is in interview calibration session.
3. Read the evidence, not the verdict. A score is only useful if the notes show what the candidate wrote or said. Send back reports that give a rating without evidence.
4. Track the hand-off. Each quarter, compare the vendor's pass rate with your later-round pass rate for the candidates it advanced, and with how your own first-round passes do. A widening gap means the bars have drifted.
5. Keep the decision yours. Treat the vendor's recommendation as one input, and record the reason for every advance or reject.
6. Make in-house rounds produce the same kind of evidence. For the rounds you keep, Interview Signal, which we make, runs on the interviewer's own computer with no bot on the call and ties each score to the candidate's own quotes; it hears the conversation but does not see the code (how it works in technical interviews).

How do you run a fair pilot?

1. Pick one role and level with steady volume, so results are comparable.
2. Get the terms in writing first: a quote for a pilot of, for example, 20 to 30 interviews, who the interviewers would be, what the report contains and how fast it arrives, which parts are automated, and the data terms above.
3. Hand over your rubric, and hold one calibration session before any live candidate.
4. Split the flow: for a set period, send some candidates to the vendor round and some to your own first round, assigned by a rule fixed in advance (for example, alternate candidates), not by recruiter choice.
5. Measure the same things for both groups: pass rate, time from application to first interview, later-round pass rate, offer acceptance and candidate feedback.
6. Read a sample of reports blind, without knowing which came from the vendor, and ask whether each score is supported by the evidence written down.
7. Decide on the numbers you agreed at the start, not on how the pilot felt.