79/100RP Score
Ranked #1 because of specialty focus and its Google rating: listed on Google as “Applied behavior analysis therapist”, 4.9★ from 34 Google reviews.
Best ABA Therapy Providers in Ajax, ON (2026)
81 ABA therapy providers ranked by RP ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Ajax: Peak Learning Centre, RP Score 79/100; 4.9★ from 34 Google reviews; open 7 days a week.
- 37
Most-reviewed: Roots & Tales clinic, 71 Google reviews at 4.8★, the most of 81 ranked; ranked #37.
Rankings can't be bought. Psychologists can't pay to change their rank or score. How we rank
81 Ajax ABA therapy providers are ranked here by RP Score, from eight published factors. 68 open Saturdays and 45 open Sundays, based on posted hours. The median Google rating is 4.9★ across 81 rated practices.
Top 10 ABA therapy providers in Ajax at a glance
Ranked by the RP Score from public listing data, not by treatment outcomes; Sponsored placements are shown separately and never change rank.
| Rank | Business | RP Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Peak Learning Centre | 79 | 4.9★ (34) | Ajax | Sat · Sun · Evenings | Overall |
| 2 | ABA Therapy Services - SenseBloom Therapy | 79 | 5.0★ (25) | Ajax | Sat · Sun | — |
| 3 | Growing Minds ABA Services | 72 | 3.9★ (11) | Pickering, 7 km away | Sat · Evenings | — |
| 4 | Side by Side Therapy | 72 | 5.0★ (9) | Vaughan, 35 km away | Sat · Sun · Evenings | — |
| 5 | Autism Made Simple | 72 | 5.0★ (7) | Scarborough, 23 km away | Sat · Sun | — |
| 6 | ABA Therapy Services - SenseBloom Therapy | 70 | 5.0★ (35) | North York, 38 km away | Sat · Sun | — |
| 7 | Autism Made Simple | 70 | 5.0★ (11) | Richmond Hill, 32 km away | Sat · Sun | — |
| 8 | Behaviour Saviours | 69 | 5.0★ (5) | Oshawa, 31 km away | Sat · Sun · Evenings | — |
| 9 | Developing Minds ABA Therapy - Home Service | 68 | 5.0★ (3) | Richmond Hill, 34 km away | Sat · Sun · Evenings | — |
| 10 | Early Start Autism Services Toronto | 68 | 4.4★ (13) | Toronto, 39 km away | Sat · Sun · Evenings | — |
The 81 best ABA therapy providers in Ajax, ranked
Ordered by RP Score, a 0–100 score from eight published factors. Paid placement never changes the order.
Ranked by the RP Score from public listing data, not by treatment outcomes; Sponsored placements are shown separately and never change rank.
Scores below: based on 7 of 8 factors; recency not yet collected. Hatched segments mark factors we don't have yet.
Based in Ajax
79/100RP ScoreRanked #2 because of specialty focus and its Google rating: listed on Google as “Applied behavior analysis therapist”, 5.0★ from 25 Google reviews.
Based in Pickering, 7 km away
72/100RP ScoreRanked #3 because of specialty focus and its Google rating: listed on Google as “Applied behavior analysis therapist”, 3.9★ from 11 Google reviews.
Based in Vaughan, 35 km away
72/100RP ScoreRanked #4 because of specialty focus and its Google rating: listed on Google as “Applied behavior analysis therapist”, 5.0★ from 9 Google reviews.
Based in Scarborough, 23 km away
72/100RP ScoreRanked #5 because of specialty focus and its Google rating: listed on Google as “Applied behavior analysis therapist”, 5.0★ from 7 Google reviews.
Based in North York, 38 km away
70/100RP ScoreRanked #6 because of specialty focus and its Google rating: listed on Google as “Applied behavior analysis therapist”, 5.0★ from 35 Google reviews.
Based in Richmond Hill, 32 km away
70/100RP ScoreRanked #7 because of specialty focus and its Google rating: listed on Google as “Applied behavior analysis therapist”, 5.0★ from 11 Google reviews.
Based in Oshawa, 31 km away
69/100RP ScoreRanked #8 because of specialty focus and its Google rating: listed on Google as “Applied behavior analysis therapist”, 5.0★ from 5 Google reviews.
Based in Richmond Hill, 34 km away
68/100RP ScoreRanked #9 because of specialty focus and its Google rating: listed on Google as “Applied behavior analysis therapist”, 5.0★ from 3 Google reviews.
Based in Toronto, 39 km away
68/100RP ScoreRanked #10 because of specialty focus and its Google rating: listed on Google as “Applied behavior analysis therapist”, 4.4★ from 13 Google reviews.
Based in Vaughan, 35 km away
68/100RP ScoreRanked #11 because of specialty focus and its Google rating: listed on Google as “Applied behavior analysis therapist”, 5.0★ from 3 Google reviews.
Based in Oshawa, 19 km away
67/100RP ScoreRanked #12 because of specialty focus and its Google rating: listed on Google as “Applied behavior analysis therapist”, 5.0★ from 13 Google reviews.
Based in East York, 18 km away
67/100RP ScoreRanked #13 because of its Google rating and specialty focus: 4.9★ from 30 Google reviews, listed on Google as “Mental health clinic”.
Based in Vaughan, 42 km away
67/100RP ScoreRanked #14 because of specialty focus and its Google rating: listed on Google as “Applied behavior analysis therapist”, 5.0★ from 4 Google reviews.
Based in Ajax
65/100RP ScoreRanked #15 because of its Google rating and proximity: 4.7★ from 27 Google reviews, based in Ajax.
Based in Ajax
64/100RP ScoreRanked #16 because of its Google rating and specialty focus: 4.5★ from 22 Google reviews, listed on Google as “Mental health service”.
Based in Mississauga, 56 km away
64/100RP ScoreRanked #17 because of specialty focus and its Google rating: listed on Google as “Applied behavior analysis therapist”, 5.0★ from 7 Google reviews.
Based in North York, 31 km away
64/100RP ScoreRanked #18 because of specialty focus and its Google rating: listed on Google as “Applied behavior analysis therapist”, 5.0★ from 10 Google reviews.
Based in Brampton, 47 km away
64/100RP ScoreRanked #19 because of specialty focus and its Google rating: listed on Google as “Applied behavior analysis therapist”, 4.9★ from 27 Google reviews.
Based in Brampton, 58 km away
63/100RP ScoreRanked #20 because of specialty focus and its Google rating: listed on Google as “Applied behavior analysis therapist”, 4.6★ from 11 Google reviews.
Based in Ajax
63/100RP ScoreRanked #21 because of its Google rating and proximity: 5.0★ from 3 Google reviews, based in Ajax.
Based in Ajax
63/100RP ScoreRanked #22 because of its Google rating and proximity: 5.0★ from 3 Google reviews, based in Ajax.
Based in Oshawa, 9 km away
63/100RP ScoreRanked #23 because of its Google rating and proximity: 4.3★ from 64 Google reviews, 9 km from Ajax.
Based in Ajax
63/100RP ScoreRanked #24 because of its Google rating and proximity: 3.4★ from 5 Google reviews, based in Ajax.
Based in Scarborough, 23 km away
63/100RP ScoreRanked #25 because of its Google rating and specialty focus: 5.0★ from 3 Google reviews, listed on Google as “Mental health service”.
ABA therapy providers ranked #26 to #50
#1 to #25 are shown in full above. Here are #26 to #50, in RP Score order; each links to its profile. We publish the top 50 of 81 ranked ABA therapy providers here; the rest are on their profiles.
Also serving Ajax
20 more ABA therapy providers within 64 km that we can't rank yet: too few reviews, or a specialty we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| ABA Expanding Minds - Behaviour Therapy | 23 km | |
| ABA Therapy | 34 km | |
| Aba Therapy Mississauga | 5.0★ (2) | 53 km |
| ABC TRANSITIONS | 32 km | |
| All Avenues (Pickering) | 5 km | |
| Alliance Behaviour Consulting (Markham): Autism, ADHD, Gifted, Twice exceptional | 18 km | |
| ATAMIC Therapy | 5.0★ (1) | 33 km |
| Beyond Therapy ABA Services | 19 km | |
| Dr. Queenie Lo and Associates | 5.0★ (1) | 23 km |
| Kidstruecare Learning Center Inc. | In Ajax | |
| Mini Minds - Children's Behaviour Therapy in Toronto | 31 km | |
| Mount Etna Child & Family Services (Oshawa) | 5.0★ (2) | 13 km |
| Mount Etna Child & Family Services (Toronto) | 5.0★ (2) | 38 km |
| Nexus ABA Therapy - Home Service | 5.0★ (2) | 63 km |
| Ottawa River Integrative Mental Health | 5.0★ (1) | 36 km |
| Peak ABA Services | 5.0★ (2) | 64 km |
| Speech Associates - Speech Therapist Markham | 5.0★ (2) | 24 km |
| Speech Associates - Speech Therapist Scarborough | 23 km | |
| Speech Associates - Speech Therapy Markham | 5.0★ (2) | 24 km |
| The Portia Learning Centre - ABA Therapy | 5.0★ (2) | 11 km |
How we ranked Ajax ABA therapy providers
We scored 81 Ajax ABA therapy providers on eight factors, weighted as shown. A practice is ranked when its specialty is confirmed and it has 3 or more Google reviews or a claimed profile. A practice with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed November 13, 2026.
Paid placement never changes a rank or score. Sponsored businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Ajax data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Review volume | 5% | Number of Google reviews, compared with the most-reviewed practice on the list | Measured |
| Recency | 5% | Share of Google reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, and round-the-clock or same-day availability | Measured |
| Specialty focus | 25% | How clearly the practice does this specialty (its Google category and name) | Measured |
| Proximity | 15% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The practice has claimed its Ranked Psychologists profile (free or paid earn the same) | Measured |
| Partnered | 5% | The practice links to Ranked Psychologists from its own website with our badge, checked periodically | Measured |
How to choose an ABA therapy provider
- Check the license with the state or provincial board that issued it; most boards publish a free online lookup.
- Make sure ABA therapy is a regular part of their work, and ask what approach they use and why.
- Ask how many hours a week they recommend and how they set goals with the family.
- Ask how often a BCBA observes sessions and meets with parents.
- Ask about fees, insurance and the cancellation policy before the first session. In the US, if you are uninsured or paying yourself, you can ask for a good faith estimate of expected charges.
- Check practical fit: in-person or online sessions, evening times, and how soon they have an opening.
- After a few sessions, ask yourself whether you feel heard. Changing to a different provider is common and fine.
Questions to ask an ABA therapy provider
- Are you accepting new clients, and how soon could I start?
- Which license do you hold, and in which state or province?
- How much of your work is ABA therapy?
- Is there a waitlist, and do you accept my insurance?
- What do you charge per session, and do you take my insurance or provide a superbill?
- Do you offer online sessions?
- What is your cancellation policy?
- What do you keep confidential, and when would you have to share information?
Terms explained
- PhD / PsyD
- Doctoral degrees in psychology. A PhD usually has a stronger research focus, a PsyD a stronger clinical focus; both can lead to a psychologist license.
- Licensed psychologist
- A person licensed by a state or provincial psychology board to practice psychology. The title is protected by law.
- Psychological associate
- In some states and provinces, a master’s-level practitioner licensed or registered by the psychology board, often with supervision requirements.
- LPC / LMHC / LCPC
- US licenses for professional or mental health counselors (the name differs by state). They provide counseling and therapy.
- LCSW
- Licensed clinical social worker: a master’s-level social worker licensed to provide therapy.
- LMFT
- Licensed marriage and family therapist: licensed to treat individuals, couples and families with a focus on relationships.
- RP / RCC
- Registered psychotherapist (Ontario) and registered clinical counsellor (British Columbia): Canadian titles for licensed therapy providers.
- PSYPACT
- An interstate agreement that lets psychologists licensed in a member state provide telepsychology to clients in other member states once they hold the required authorization.
- Telehealth
- Sessions held by secure video or phone instead of in person. The provider generally needs to be licensed where the client is located.
- CBT
- Cognitive behavioral therapy: a structured talk therapy that works on the links between thoughts, feelings and behavior.
- DBT
- Dialectical behavior therapy: a form of CBT that teaches skills for managing intense emotions and relationships.
- ERP
- Exposure and response prevention: a form of CBT used for OCD.
ABA therapy providers in Ajax: frequently asked questions
Who is the best ABA therapy provider in Ajax?
By RP Score, the highest-ranked ABA therapy provider in Ajax, ON is Peak Learning Centre with an RP Score of 79/100. It has 4.9★ from 34 Google reviews. It is open 7 days a week. ABA Therapy Services - SenseBloom Therapy (#2) and Growing Minds ABA Services (#3) follow. We ranked 81 ABA therapy providers on eight factors, last updated November 13, 2026.
How many ABA therapy providers are there in Ajax?
RankedPsychologists ranks 81 ABA therapy providers serving Ajax, ON. 9 of them are based in Ajax; the rest serve it from nearby towns. Another 20 within 64 km are listed but not ranked yet. Counts are as of November 2026.
What should I do if I need help right now?
In crisis or thinking about suicide? Call or text 988 (US and Canada), any time. In an emergency, call 911. This site cannot help in an emergency.
Which ABA therapy providers in Ajax work on weekends?
68 of 81 ranked ABA therapy providers post Saturday hours and 45 post Sunday hours. The highest-ranked open Saturdays are Peak Learning Centre (#1), ABA Therapy Services - SenseBloom Therapy (#2) and Growing Minds ABA Services (#3). Posted hours are office hours; many practices also offer evening or online sessions by appointment.
What Google rating do Ajax ABA therapy providers have?
The median Google rating among 81 rated ABA therapy providers in Ajax is 4.9★, with a median of 12 reviews. Roots & Tales clinic has the most, 71 reviews, and ranks #37. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does RankedPsychologists rank ABA therapy providers?
Each ABA therapy provider gets a 0–100 RP Score from eight published factors, led by reputation (25%), specialty focus (25%), proximity (15%) and availability (10%). A practice with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only practices with a confirmed specialty and 3 or more reviews, or a claimed profile, are ranked.
Do ABA therapy providers outside Ajax count in this ranking?
Yes, if they are within 64 km of the Ajax city centre, our service radius for ABA therapy providers. Each listing shows where the practice is based and how far away it is. Proximity is 15% of the RP Score, so a nearby practice gets a small edge.
Can ABA therapy providers pay to rank higher on RankedPsychologists?
No. The RP Score never reads payment status, and this ranking has 0 paid placements. Up to 3 Featured practices may appear above the list, labelled Sponsored and showing their honest rank.
How are aBA therapy providers in Ajax ranked?
Each practice gets an RP Score from 0 to 100 from 8 published factors, including its Google rating, how clearly it focuses on ABA therapy and how close it is. Sponsored placements are shown separately and never change rank. The score does not measure treatment outcomes.
Who provides ABA therapy?
ABA programs are designed and supervised by board certified behavior analysts (BCBA). Day-to-day sessions are often delivered by registered behavior technicians (RBT) working under that supervision. Many US health plans cover ABA for autism; the rules differ by state and plan, so ask the provider and your insurer.
Can I see an ABA therapy provider online?
Often, yes. Licensing generally follows where you are during the session, so the provider needs to be licensed or authorized there. In the US, psychologists in PSYPACT member states can offer telepsychology to clients in other member states; counselors and social workers have their own rules. In Canada, ask whether the provider is registered in your province.
What if I need help right now?
Do not wait for a consultation. Call or text 988 (US and Canada) if you are in crisis or thinking about suicide, at any time. In an emergency, call 911.
Update log for Ajax
- November 2026: RP Scores recalculated for 81 ABA therapy providers serving Ajax.
- November 2026: 1 duplicate listing merged.
More ABA therapy providers and Ajax pages
ABA therapy providers near Ajax
- ABA therapy providers in Pickering, ON87 ranked
- ABA therapy providers in Oshawa, ON50 ranked
- ABA therapy providers in Markham, ON90 ranked
- ABA therapy providers in Scarborough, ON92 ranked
- ABA therapy providers in Uxbridge, ON59 ranked
- ABA therapy providers in East York, ON95 ranked
- ABA therapy providers in Willowdale, ON94 ranked
- ABA therapy providers in North York, ON94 ranked
- ABA therapy providers in Richmond Hill, ON94 ranked
- ABA therapy providers in Toronto, ON100 ranked
Other specialties in Ajax
- Psychologists in Ajax112 ranked
- Therapists and counselors in Ajax234 ranked
- Child and teen therapists in Ajax88 ranked
- Couples therapists in Ajax88 ranked
- Family therapists in Ajax98 ranked
- Neuropsychologists in Ajax8 ranked
- Psychological testing practices in Ajax8 ranked
- Anxiety and OCD therapists in Ajax15 ranked
- Trauma and PTSD therapists in Ajax49 ranked
- Eating disorder therapists in Ajax19 ranked
- Psychiatrists in Ajax45 ranked
- Clinical social workers in Ajax182 ranked
- Addiction counselors in Ajax78 ranked
- All psychologists in Ajax